./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/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_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/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_c18e4aac-f776-49e3-a4dc-bfc650c41ded/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 fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 --- 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 14:40:11,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:40:11,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:40:11,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:40:11,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:40:11,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:40:11,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:40:11,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:40:11,867 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:40:11,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:40:11,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:40:11,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:40:11,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:40:11,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:40:11,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:40:11,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:40:11,882 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:40:11,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:40:11,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:40:11,894 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:40:11,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:40:11,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:40:11,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:40:11,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:40:11,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:40:11,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:40:11,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:40:11,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:40:11,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:40:11,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:40:11,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:40:11,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:40:11,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:40:11,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:40:11,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:40:11,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:40:11,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:40:11,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:40:11,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:40:11,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:40:11,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:40:11,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:40:11,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:40:11,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:40:11,989 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:40:11,990 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:40:11,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:40:11,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:40:11,991 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:40:11,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:40:11,992 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:40:11,992 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:40:11,993 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:40:11,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:40:11,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:40:11,994 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:40:11,994 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:40:11,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:40:11,994 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:40:11,995 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:40:11,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:40:11,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:40:11,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:40:11,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:40:11,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:40:11,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:40:11,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:40:11,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:40:11,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:40:11,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:40:11,998 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:40:11,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:40:11,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:40:11,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:40:11,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:40:11,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:40:12,000 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:40:12,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:40:12,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:40:12,001 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:40:12,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:40:12,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:40:12,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:40:12,002 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_c18e4aac-f776-49e3-a4dc-bfc650c41ded/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf72d109deb69f1acda4466c7376bd6c362d474983f8a50a2faed8c0a192a76 [2022-11-23 14:40:12,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:40:12,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:40:12,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:40:12,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:40:12,324 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:40:12,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-11-23 14:40:15,365 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:40:15,540 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:40:15,542 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/sv-benchmarks/c/array-examples/standard_partition_ground-2.i [2022-11-23 14:40:15,548 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/data/d3622d6a1/234b3724816f4a86b17bf0c2d64569cb/FLAG493d2667f [2022-11-23 14:40:15,590 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/data/d3622d6a1/234b3724816f4a86b17bf0c2d64569cb [2022-11-23 14:40:15,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:40:15,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:40:15,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:40:15,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:40:15,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:40:15,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:15,610 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37b34345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15, skipping insertion in model container [2022-11-23 14:40:15,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:15,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:40:15,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:40:15,840 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_c18e4aac-f776-49e3-a4dc-bfc650c41ded/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2022-11-23 14:40:15,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:40:15,875 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:40:15,896 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_c18e4aac-f776-49e3-a4dc-bfc650c41ded/sv-benchmarks/c/array-examples/standard_partition_ground-2.i[820,833] [2022-11-23 14:40:15,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:40:15,933 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:40:15,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15 WrapperNode [2022-11-23 14:40:15,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:40:15,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:40:15,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:40:15,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:40:15,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:15,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:15,983 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2022-11-23 14:40:15,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:40:15,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:40:15,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:40:15,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:40:15,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:15,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:40:16,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:40:16,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:40:16,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:40:16,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (1/1) ... [2022-11-23 14:40:16,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:40:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:16,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:40:16,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:40:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:40:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:40:16,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:40:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:40:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:40:16,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:40:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:40:16,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:40:16,218 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:40:16,220 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:40:16,369 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:40:16,455 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:40:16,456 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 14:40:16,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:16 BoogieIcfgContainer [2022-11-23 14:40:16,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:40:16,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:40:16,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:40:16,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:40:16,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:40:15" (1/3) ... [2022-11-23 14:40:16,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6cca17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:16, skipping insertion in model container [2022-11-23 14:40:16,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:40:15" (2/3) ... [2022-11-23 14:40:16,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6cca17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:40:16, skipping insertion in model container [2022-11-23 14:40:16,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:40:16" (3/3) ... [2022-11-23 14:40:16,469 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-2.i [2022-11-23 14:40:16,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:40:16,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:40:16,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:40:16,544 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;@461021e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:40:16,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:40:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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 14:40:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:40:16,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:16,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:16,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1646487347, now seen corresponding path program 1 times [2022-11-23 14:40:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:16,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751616355] [2022-11-23 14:40:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:16,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:16,874 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 14:40:16,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751616355] [2022-11-23 14:40:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751616355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:16,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:40:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:40:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933728873] [2022-11-23 14:40:16,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:16,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:16,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:16,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:40:16,930 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) 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 14:40:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:16,993 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-23 14:40:16,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:16,996 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 14:40:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:17,003 INFO L225 Difference]: With dead ends: 19 [2022-11-23 14:40:17,003 INFO L226 Difference]: Without dead ends: 10 [2022-11-23 14:40:17,006 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 14:40:17,009 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:17,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:40:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-23 14:40:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-23 14:40:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) 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 14:40:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-23 14:40:17,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-11-23 14:40:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:17,054 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-23 14:40:17,054 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 14:40:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-23 14:40:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:40:17,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:17,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:17,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:40:17,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:17,056 INFO L85 PathProgramCache]: Analyzing trace with hash -566801800, now seen corresponding path program 1 times [2022-11-23 14:40:17,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:17,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062835571] [2022-11-23 14:40:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:17,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:17,210 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 14:40:17,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062835571] [2022-11-23 14:40:17,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062835571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:17,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537690436] [2022-11-23 14:40:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:17,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:17,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:17,216 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:17,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:40:17,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:17,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:40:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:40:17,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:40:17,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537690436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:40:17,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:40:17,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-11-23 14:40:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805760944] [2022-11-23 14:40:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:40:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:40:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:40:17,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:40:17,341 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 14:40:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:17,362 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-11-23 14:40:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:40:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 14:40:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:17,363 INFO L225 Difference]: With dead ends: 18 [2022-11-23 14:40:17,363 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 14:40:17,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:40:17,365 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:17,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:40:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 14:40:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 14:40:17,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 14:40:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-23 14:40:17,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-23 14:40:17,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:17,371 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-23 14:40:17,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 14:40:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-23 14:40:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:40:17,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:17,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:17,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:17,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:17,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:17,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1092468414, now seen corresponding path program 1 times [2022-11-23 14:40:17,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:17,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350057926] [2022-11-23 14:40:17,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:17,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:17,690 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 14:40:17,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:17,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350057926] [2022-11-23 14:40:17,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350057926] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:17,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579544014] [2022-11-23 14:40:17,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:17,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:17,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:17,692 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:17,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:40:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:40:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:40:17,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:17,856 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 14:40:17,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579544014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:17,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398094038] [2022-11-23 14:40:17,888 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:17,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:17,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:17,900 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:17,901 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,090 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:18,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:40:18,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:18,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:18,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:18,473 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:18,474 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 260 treesize of output 259 [2022-11-23 14:40:18,724 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 14:40:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:18,778 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:40:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:40:18,879 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:18,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:19,002 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:19,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:19,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:40:19,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:19,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:19,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:19,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:19,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:19,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:19,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:40:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426683076] [2022-11-23 14:40:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:40:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:40:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:40:19,508 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 14:40:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:19,559 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-11-23 14:40:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:40:19,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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) Word has length 10 [2022-11-23 14:40:19,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:19,560 INFO L225 Difference]: With dead ends: 24 [2022-11-23 14:40:19,560 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 14:40:19,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:40:19,562 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:19,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:40:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 14:40:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 14:40:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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 14:40:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-23 14:40:19,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-11-23 14:40:19,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:19,567 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-23 14:40:19,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 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 14:40:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-23 14:40:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:40:19,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:19,568 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:19,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:19,774 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:19,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 428355863, now seen corresponding path program 2 times [2022-11-23 14:40:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:19,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243711943] [2022-11-23 14:40:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:40:19,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:19,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243711943] [2022-11-23 14:40:19,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243711943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547327188] [2022-11-23 14:40:19,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:40:19,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:19,930 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:19,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:40:20,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:40:20,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:40:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:40:20,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:40:20,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547327188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:20,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462040152] [2022-11-23 14:40:20,080 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:20,080 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:20,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:20,081 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:20,081 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,168 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:20,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:40:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:20,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:20,345 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:20,346 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 260 treesize of output 259 [2022-11-23 14:40:20,474 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 14:40:20,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:20,510 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:40:20,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:40:20,568 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:20,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:20,647 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:20,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:20,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:40:20,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:20,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:20,800 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:21,076 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:21,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:21,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:21,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:40:21,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686526340] [2022-11-23 14:40:21,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:21,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:40:21,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:40:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:40:21,078 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 14:40:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:21,128 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-23 14:40:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:40:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 14:40:21,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:21,130 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:40:21,131 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:40:21,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:40:21,133 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:21,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:40:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:40:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:40:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-23 14:40:21,147 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-23 14:40:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:21,148 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-23 14:40:21,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 14:40:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-23 14:40:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 14:40:21,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:21,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:21,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:21,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:21,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1056972403, now seen corresponding path program 3 times [2022-11-23 14:40:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:21,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311184918] [2022-11-23 14:40:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:21,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:21,509 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 14:40:21,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311184918] [2022-11-23 14:40:21,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311184918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:21,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991497472] [2022-11-23 14:40:21,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:40:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:21,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:21,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:40:21,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:40:21,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:40:21,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:21,630 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 14:40:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:21,686 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 14:40:21,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991497472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:21,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259430625] [2022-11-23 14:40:21,691 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:21,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:21,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:21,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:21,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,742 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:40:21,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:40:21,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,797 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:21,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:21,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:21,928 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:21,929 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 260 treesize of output 259 [2022-11-23 14:40:22,048 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 14:40:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:22,083 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:40:22,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:40:22,134 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:22,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:22,198 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:22,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:22,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:22,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:22,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:22,319 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:22,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:22,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:22,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:22,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:40:22,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339514713] [2022-11-23 14:40:22,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:22,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:40:22,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:40:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:40:22,610 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 14:40:22,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:22,654 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-23 14:40:22,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:40:22,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 19 [2022-11-23 14:40:22,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:22,655 INFO L225 Difference]: With dead ends: 42 [2022-11-23 14:40:22,656 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:40:22,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:40:22,657 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:22,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:40:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:40:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-23 14:40:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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 14:40:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-23 14:40:22,663 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-11-23 14:40:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:22,663 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-23 14:40:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 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 14:40:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-23 14:40:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:40:22,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:22,665 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:22,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:40:22,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:22,870 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:22,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1293039187, now seen corresponding path program 4 times [2022-11-23 14:40:22,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:22,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659879154] [2022-11-23 14:40:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:23,232 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 14:40:23,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659879154] [2022-11-23 14:40:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659879154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:23,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107029884] [2022-11-23 14:40:23,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:40:23,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:23,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:23,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:40:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:23,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:40:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:23,381 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 14:40:23,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:23,598 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 14:40:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107029884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856421254] [2022-11-23 14:40:23,601 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:23,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:23,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:23,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:23,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,659 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:23,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:23,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:40:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:23,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:23,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:23,788 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:23,789 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 260 treesize of output 259 [2022-11-23 14:40:23,908 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 14:40:23,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:23,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:40:23,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:40:23,995 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:23,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:24,058 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:24,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:24,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:40:24,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:24,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:24,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:24,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '850#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:24,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:24,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:24,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:40:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261636467] [2022-11-23 14:40:24,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:40:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:24,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:40:24,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:40:24,488 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 14:40:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:24,564 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-23 14:40:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:40:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 14:40:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:24,566 INFO L225 Difference]: With dead ends: 54 [2022-11-23 14:40:24,566 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:40:24,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:40:24,567 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:24,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:24,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:40:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 14:40:24,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 14:40:24,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-11-23 14:40:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:24,575 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 14:40:24,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 14:40:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 14:40:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:40:24,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:24,576 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:24,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:24,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:40:24,782 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:24,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:24,783 INFO L85 PathProgramCache]: Analyzing trace with hash 105370093, now seen corresponding path program 5 times [2022-11-23 14:40:24,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:24,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619683596] [2022-11-23 14:40:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:24,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:25,494 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 14:40:25,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619683596] [2022-11-23 14:40:25,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619683596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626539550] [2022-11-23 14:40:25,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:40:25,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:25,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:25,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:25,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:40:25,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:40:25,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:40:25,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-23 14:40:25,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-23 14:40:25,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626539550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:25,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860757931] [2022-11-23 14:40:25,909 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:25,909 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:25,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:25,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:25,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:25,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:25,957 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:40:25,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:40:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:25,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:26,012 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:26,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:26,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:40:26,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:26,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:26,128 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:40:26,129 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 270 treesize of output 258 [2022-11-23 14:40:26,209 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 14:40:26,241 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:40:26,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-23 14:40:26,283 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:26,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:26,361 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:26,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:26,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:26,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:26,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:26,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:26,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1279#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:26,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:26,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:26,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 34 [2022-11-23 14:40:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940279457] [2022-11-23 14:40:26,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:40:26,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:26,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:40:26,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 14:40:26,931 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:27,550 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-11-23 14:40:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:40:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 14:40:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:27,552 INFO L225 Difference]: With dead ends: 67 [2022-11-23 14:40:27,552 INFO L226 Difference]: Without dead ends: 52 [2022-11-23 14:40:27,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1199, Invalid=2833, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:40:27,554 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 150 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:27,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 40 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:40:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-23 14:40:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-23 14:40:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 14:40:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-23 14:40:27,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2022-11-23 14:40:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:27,570 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-23 14:40:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:40:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-23 14:40:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:40:27,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:27,572 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:27,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:27,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:40:27,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash 103536344, now seen corresponding path program 6 times [2022-11-23 14:40:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:27,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134592976] [2022-11-23 14:40:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:28,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134592976] [2022-11-23 14:40:28,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134592976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042292479] [2022-11-23 14:40:28,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:40:28,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:28,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:28,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:28,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:40:28,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:40:28,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:28,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:40:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:28,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:29,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042292479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:29,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498766118] [2022-11-23 14:40:29,690 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:29,690 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:29,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:29,691 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:29,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,743 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:29,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:40:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:40:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:29,884 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:40:29,884 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 270 treesize of output 258 [2022-11-23 14:40:29,944 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 14:40:29,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:29,983 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:40:29,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:40:30,027 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:30,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:30,108 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:30,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:30,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:40:30,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:30,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:30,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:30,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1900#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:30,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:30,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:30,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 14:40:30,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063059122] [2022-11-23 14:40:30,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:30,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:40:30,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:40:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=1898, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 14:40:30,644 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 14:40:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:30,746 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2022-11-23 14:40:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:40:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 50 [2022-11-23 14:40:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:30,747 INFO L225 Difference]: With dead ends: 104 [2022-11-23 14:40:30,748 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 14:40:30,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1294, Invalid=1898, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 14:40:30,749 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:30,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 14:40:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-23 14:40:30,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 14:40:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-11-23 14:40:30,759 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2022-11-23 14:40:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:30,760 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-11-23 14:40:30,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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 14:40:30,760 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-11-23 14:40:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 14:40:30,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:30,762 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:30,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:30,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash 365754573, now seen corresponding path program 7 times [2022-11-23 14:40:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:30,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575527886] [2022-11-23 14:40:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:33,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575527886] [2022-11-23 14:40:33,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575527886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:33,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974438513] [2022-11-23 14:40:33,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:40:33,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:33,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:33,274 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:33,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:40:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:40:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974438513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:36,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656677] [2022-11-23 14:40:36,903 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:36,903 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:36,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:36,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:36,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:36,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:36,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:36,949 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:40:36,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:40:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:37,006 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:37,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:37,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:37,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:37,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:37,131 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:37,132 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 260 treesize of output 259 [2022-11-23 14:40:37,238 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 14:40:37,263 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:40:37,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-23 14:40:37,305 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:37,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:37,358 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:37,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:37,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:37,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:37,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:37,472 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:37,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2799#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:37,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:37,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:37,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 14:40:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132193397] [2022-11-23 14:40:37,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:40:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:37,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:40:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5069, Invalid=6273, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 14:40:37,939 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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 14:40:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:38,181 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2022-11-23 14:40:38,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:40:38,182 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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 75 [2022-11-23 14:40:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:38,187 INFO L225 Difference]: With dead ends: 154 [2022-11-23 14:40:38,187 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 14:40:38,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5069, Invalid=6273, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 14:40:38,191 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:38,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:40:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 14:40:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-23 14:40:38,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 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 14:40:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-11-23 14:40:38,204 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2022-11-23 14:40:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:38,204 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-11-23 14:40:38,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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 14:40:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-11-23 14:40:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-23 14:40:38,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:38,207 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:38,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:38,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:38,414 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1906712787, now seen corresponding path program 8 times [2022-11-23 14:40:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:38,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283683766] [2022-11-23 14:40:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-23 14:40:45,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283683766] [2022-11-23 14:40:45,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283683766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978592731] [2022-11-23 14:40:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:40:45,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:45,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:45,711 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:45,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:40:46,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:40:46,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:40:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:40:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-23 14:40:47,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-23 14:40:47,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978592731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:40:47,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534734835] [2022-11-23 14:40:47,634 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:40:47,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:40:47,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:40:47,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:40:47,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:40:47,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,675 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:40:47,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:40:47,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,738 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:40:47,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:40:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:40:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:47,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:47,864 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:40:47,864 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 260 treesize of output 259 [2022-11-23 14:40:47,984 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 14:40:48,008 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:40:48,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-11-23 14:40:48,051 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:48,113 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:40:48,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:40:48,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:40:48,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:48,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:40:48,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:48,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4220#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:40:48,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:48,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:48,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-23 14:40:48,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500793915] [2022-11-23 14:40:48,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:48,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 14:40:48,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 14:40:48,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5366, Invalid=11146, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 14:40:48,917 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 14:40:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:54,268 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-11-23 14:40:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-23 14:40:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 125 [2022-11-23 14:40:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:54,274 INFO L225 Difference]: With dead ends: 179 [2022-11-23 14:40:54,274 INFO L226 Difference]: Without dead ends: 152 [2022-11-23 14:40:54,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7996 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=17543, Invalid=34213, Unknown=0, NotChecked=0, Total=51756 [2022-11-23 14:40:54,283 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 404 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:54,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 40 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:40:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-23 14:40:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-23 14:40:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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 14:40:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-11-23 14:40:54,302 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 125 [2022-11-23 14:40:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:54,302 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-11-23 14:40:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 14:40:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-11-23 14:40:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-23 14:40:54,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:54,307 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:54,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:54,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:40:54,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:40:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:54,511 INFO L85 PathProgramCache]: Analyzing trace with hash -818185320, now seen corresponding path program 9 times [2022-11-23 14:40:54,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:54,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59677758] [2022-11-23 14:40:54,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:54,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:41:02,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59677758] [2022-11-23 14:41:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59677758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590621449] [2022-11-23 14:41:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:41:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:02,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:02,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:41:02,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:41:02,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:41:02,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:41:02,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:15,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:41:15,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590621449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:15,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [575456300] [2022-11-23 14:41:15,075 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:41:15,075 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:41:15,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:41:15,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:41:15,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:41:15,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,132 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:41:15,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:41:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:41:15,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:41:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:15,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:41:15,251 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:41:15,251 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 260 treesize of output 259 [2022-11-23 14:41:15,349 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 14:41:15,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:41:15,375 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:41:15,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:41:15,419 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:41:15,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:41:15,527 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:41:15,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:41:15,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:41:15,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:41:15,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:41:16,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6169#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:41:16,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:41:16,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:41:16,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 14:41:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525421016] [2022-11-23 14:41:16,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:41:16,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 14:41:16,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:41:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 14:41:16,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20522, Invalid=22950, Unknown=0, NotChecked=0, Total=43472 [2022-11-23 14:41:16,444 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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 14:41:16,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:16,999 INFO L93 Difference]: Finished difference Result 304 states and 410 transitions. [2022-11-23 14:41:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 14:41:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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 150 [2022-11-23 14:41:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:17,002 INFO L225 Difference]: With dead ends: 304 [2022-11-23 14:41:17,002 INFO L226 Difference]: Without dead ends: 253 [2022-11-23 14:41:17,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=20522, Invalid=22950, Unknown=0, NotChecked=0, Total=43472 [2022-11-23 14:41:17,005 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:17,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:41:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-23 14:41:17,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-23 14:41:17,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 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 14:41:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-11-23 14:41:17,027 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 150 [2022-11-23 14:41:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:17,028 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-11-23 14:41:17,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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 14:41:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-11-23 14:41:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-23 14:41:17,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:17,032 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:17,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 14:41:17,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:41:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 415490893, now seen corresponding path program 10 times [2022-11-23 14:41:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:41:17,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142522052] [2022-11-23 14:41:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:41:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:41:43,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:41:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142522052] [2022-11-23 14:41:43,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142522052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:41:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108722581] [2022-11-23 14:41:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:41:43,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:43,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:43,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:41:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 2156 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 14:41:43,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:41:44,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:42:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108722581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1694044845] [2022-11-23 14:42:32,996 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:42:32,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:42:32,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:42:32,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:42:32,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:42:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,048 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:42:33,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:42:33,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-23 14:42:33,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:42:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:42:33,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:33,203 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:42:33,203 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 260 treesize of output 259 [2022-11-23 14:42:33,308 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 14:42:33,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:42:33,334 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:42:33,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:42:33,387 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:42:33,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:42:33,452 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:42:33,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:42:33,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:42:33,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:42:33,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:42:33,568 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:42:34,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9180#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:42:34,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:42:34,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:42:34,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 14:42:34,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407229597] [2022-11-23 14:42:34,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:34,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 14:42:34,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 14:42:34,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81829, Invalid=86681, Unknown=0, NotChecked=0, Total=168510 [2022-11-23 14:42:34,698 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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 14:42:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:38,190 INFO L93 Difference]: Finished difference Result 506 states and 713 transitions. [2022-11-23 14:42:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 14:42:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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 251 [2022-11-23 14:42:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:38,194 INFO L225 Difference]: With dead ends: 506 [2022-11-23 14:42:38,194 INFO L226 Difference]: Without dead ends: 455 [2022-11-23 14:42:38,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 409 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 65.2s TimeCoverageRelationStatistics Valid=81829, Invalid=86681, Unknown=0, NotChecked=0, Total=168510 [2022-11-23 14:42:38,202 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:38,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:42:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-23 14:42:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-23 14:42:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0088105726872247) internal successors, (458), 454 states have internal predecessors, (458), 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 14:42:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 458 transitions. [2022-11-23 14:42:38,237 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 458 transitions. Word has length 251 [2022-11-23 14:42:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:38,238 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 458 transitions. [2022-11-23 14:42:38,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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 14:42:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 458 transitions. [2022-11-23 14:42:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-23 14:42:38,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:38,248 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:38,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:38,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:38,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:42:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1013231059, now seen corresponding path program 11 times [2022-11-23 14:42:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:38,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014964242] [2022-11-23 14:42:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-23 14:44:20,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:20,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014964242] [2022-11-23 14:44:20,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014964242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:20,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049890482] [2022-11-23 14:44:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:44:20,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:20,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:20,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:44:37,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 14:44:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:37,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:44:37,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2022-11-23 14:44:41,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2022-11-23 14:44:45,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049890482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779145434] [2022-11-23 14:44:45,695 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:44:45,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:44:45,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:44:45,696 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:44:45,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:44:45,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,737 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:44:45,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:44:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,792 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:44:45,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:44:45,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:44:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:44:45,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:45,901 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:44:45,902 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 260 treesize of output 259 [2022-11-23 14:44:46,004 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 14:44:46,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:44:46,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:44:46,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:44:46,071 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:44:46,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:44:46,135 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:44:46,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:44:46,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:44:46,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:44:46,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:44:46,246 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:48,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14257#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:48,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:48,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:48,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 25, 25] total 451 [2022-11-23 14:44:48,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141855043] [2022-11-23 14:44:48,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:48,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 451 states [2022-11-23 14:44:48,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 451 interpolants. [2022-11-23 14:44:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83002, Invalid=125390, Unknown=0, NotChecked=0, Total=208392 [2022-11-23 14:44:48,370 INFO L87 Difference]: Start difference. First operand 455 states and 458 transitions. Second operand has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 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 14:46:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:11,760 INFO L93 Difference]: Finished difference Result 555 states and 609 transitions. [2022-11-23 14:46:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 451 states. [2022-11-23 14:46:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 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 453 [2022-11-23 14:46:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:11,764 INFO L225 Difference]: With dead ends: 555 [2022-11-23 14:46:11,764 INFO L226 Difference]: Without dead ends: 504 [2022-11-23 14:46:11,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2164 GetRequests, 1306 SyntacticMatches, 0 SemanticMatches, 858 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103144 ImplicationChecksByTransitivity, 147.8s TimeCoverageRelationStatistics Valid=264755, Invalid=473985, Unknown=0, NotChecked=0, Total=738740 [2022-11-23 14:46:11,814 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1215 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:11,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 48 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:46:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-23 14:46:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-11-23 14:46:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0079522862823063) internal successors, (507), 503 states have internal predecessors, (507), 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 14:46:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 507 transitions. [2022-11-23 14:46:11,851 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 507 transitions. Word has length 453 [2022-11-23 14:46:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:11,853 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 507 transitions. [2022-11-23 14:46:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 451 states, 451 states have (on average 1.0266075388026608) internal successors, (463), 451 states have internal predecessors, (463), 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 14:46:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 507 transitions. [2022-11-23 14:46:11,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-23 14:46:11,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:11,858 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:11,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:12,078 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 11562136, now seen corresponding path program 12 times [2022-11-23 14:46:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:12,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811037846] [2022-11-23 14:46:12,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:12,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-23 14:47:57,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811037846] [2022-11-23 14:47:57,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811037846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:57,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873039637] [2022-11-23 14:47:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:47:57,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:57,770 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:57,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:47:59,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:47:59,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:59,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 4295 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-23 14:47:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-23 14:47:59,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-23 14:51:18,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873039637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:18,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191366833] [2022-11-23 14:51:18,186 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:51:18,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:18,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:18,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:18,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,228 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 14:51:18,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-23 14:51:18,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,273 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 14:51:18,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-23 14:51:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:51:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:18,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:18,378 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:51:18,378 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 260 treesize of output 259 [2022-11-23 14:51:18,473 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 14:51:18,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:18,498 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:51:18,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-11-23 14:51:18,537 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:51:18,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:51:18,592 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-23 14:51:18,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2022-11-23 14:51:18,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:51:18,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-23 14:51:18,702 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:21,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20990#(and (<= 0 |ULTIMATE.start_main_~#aa~0#1.base|) (<= 0 |#NULL.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#bb~0#1.offset|) (<= 0 |ULTIMATE.start_main_~#aa~0#1.offset|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#bb~0#1.base|) (+ |ULTIMATE.start_main_~#bb~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~b~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start_main_~#aa~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#bb~0#1.base|) (<= |#NULL.base| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~#bb~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= 0 |ULTIMATE.start_main_#t~mem8#1|) 1 0)))' at error location [2022-11-23 14:51:21,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:21,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:21,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-23 14:51:21,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741911300] [2022-11-23 14:51:21,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:21,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-23 14:51:21,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-23 14:51:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328474, Invalid=338198, Unknown=0, NotChecked=0, Total=666672 [2022-11-23 14:51:21,429 INFO L87 Difference]: Start difference. First operand 504 states and 507 transitions. Second operand has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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 14:51:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:42,059 INFO L93 Difference]: Finished difference Result 1008 states and 1418 transitions. [2022-11-23 14:51:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-23 14:51:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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 502 [2022-11-23 14:51:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:42,065 INFO L225 Difference]: With dead ends: 1008 [2022-11-23 14:51:42,065 INFO L226 Difference]: Without dead ends: 909 [2022-11-23 14:51:42,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1094 SyntacticMatches, 0 SemanticMatches, 815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8886 ImplicationChecksByTransitivity, 264.8s TimeCoverageRelationStatistics Valid=328474, Invalid=338198, Unknown=0, NotChecked=0, Total=666672 [2022-11-23 14:51:42,097 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:42,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:51:42,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-23 14:51:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 909. [2022-11-23 14:51:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.0044052863436124) internal successors, (912), 908 states have internal predecessors, (912), 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 14:51:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 912 transitions. [2022-11-23 14:51:42,171 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 912 transitions. Word has length 502 [2022-11-23 14:51:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:42,172 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 912 transitions. [2022-11-23 14:51:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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 14:51:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 912 transitions. [2022-11-23 14:51:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-11-23 14:51:42,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:42,182 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:51:42,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:42,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c18e4aac-f776-49e3-a4dc-bfc650c41ded/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:51:42,395 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1630685517, now seen corresponding path program 13 times [2022-11-23 14:51:42,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:42,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365777801] [2022-11-23 14:51:42,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:42,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat