./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b073cc2eb0b196ef0c05471292790dfe61756b839736ddb49ad92ee60513afd2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:31:31,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:31:31,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:31:32,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:31:32,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:31:32,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:31:32,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:31:32,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:31:32,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:31:32,019 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:31:32,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:31:32,021 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:31:32,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:31:32,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:31:32,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:31:32,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:31:32,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:31:32,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:31:32,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:31:32,028 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:31:32,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:31:32,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:31:32,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:31:32,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:31:32,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:31:32,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:31:32,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:31:32,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:31:32,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:31:32,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:31:32,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:31:32,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:31:32,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:31:32,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:31:32,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:31:32,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:31:32,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:31:32,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:31:32,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:31:32,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:31:32,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:31:32,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:31:32,063 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:31:32,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:31:32,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:31:32,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:31:32,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:31:32,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:31:32,065 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:31:32,065 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:31:32,065 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:31:32,065 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:31:32,065 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:31:32,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:31:32,066 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:31:32,066 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:31:32,066 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:31:32,066 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:31:32,066 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:31:32,066 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:31:32,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:31:32,067 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:31:32,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:31:32,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:31:32,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:31:32,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:31:32,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:31:32,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:31:32,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:32,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:31:32,069 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:31:32,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:31:32,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:31:32,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:31:32,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:31:32,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:31:32,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:31:32,070 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_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b073cc2eb0b196ef0c05471292790dfe61756b839736ddb49ad92ee60513afd2 [2022-12-14 12:31:32,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:31:32,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:31:32,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:31:32,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:31:32,249 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:31:32,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-12-14 12:31:34,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:31:34,924 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:31:34,924 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i [2022-12-14 12:31:34,929 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/data/d6c15580c/9914d274bb1e42c682ddc61772fca74e/FLAG3b5901170 [2022-12-14 12:31:34,940 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/data/d6c15580c/9914d274bb1e42c682ddc61772fca74e [2022-12-14 12:31:34,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:31:34,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:31:34,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:34,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:31:34,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:31:34,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:34" (1/1) ... [2022-12-14 12:31:34,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eff1f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:34, skipping insertion in model container [2022-12-14 12:31:34,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:31:34" (1/1) ... [2022-12-14 12:31:34,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:31:34,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:31:35,091 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_63937109-4af6-40a3-b152-ae7a806b2cef/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-12-14 12:31:35,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:35,116 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:31:35,129 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_63937109-4af6-40a3-b152-ae7a806b2cef/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-2.i[821,834] [2022-12-14 12:31:35,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:31:35,150 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:31:35,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35 WrapperNode [2022-12-14 12:31:35,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:31:35,151 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:35,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:31:35,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:31:35,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,181 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2022-12-14 12:31:35,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:31:35,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:31:35,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:31:35,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:31:35,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,196 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:31:35,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:31:35,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:31:35,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:31:35,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (1/1) ... [2022-12-14 12:31:35,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:31:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:35,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:31:35,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:31:35,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:31:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:31:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:31:35,314 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:31:35,315 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:31:35,431 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:31:35,471 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:31:35,472 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 12:31:35,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:35 BoogieIcfgContainer [2022-12-14 12:31:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:31:35,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:31:35,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:31:35,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:31:35,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:31:34" (1/3) ... [2022-12-14 12:31:35,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42798232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:35, skipping insertion in model container [2022-12-14 12:31:35,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:31:35" (2/3) ... [2022-12-14 12:31:35,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42798232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:31:35, skipping insertion in model container [2022-12-14 12:31:35,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:31:35" (3/3) ... [2022-12-14 12:31:35,480 INFO L112 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2022-12-14 12:31:35,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:31:35,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:31:35,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:31:35,535 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;@375dec00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:31:35,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:31:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:35,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 12:31:35,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:35,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 12:31:35,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1393815351, now seen corresponding path program 1 times [2022-12-14 12:31:35,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:35,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626082856] [2022-12-14 12:31:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:31:35,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626082856] [2022-12-14 12:31:35,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626082856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:31:35,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:31:35,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:31:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958793452] [2022-12-14 12:31:35,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:31:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:31:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:31:35,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:35,743 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:35,785 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-12-14 12:31:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:31:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 12:31:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:35,795 INFO L225 Difference]: With dead ends: 22 [2022-12-14 12:31:35,795 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 12:31:35,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:31:35,801 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:35,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 12:31:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-12-14 12:31:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-12-14 12:31:35,832 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2022-12-14 12:31:35,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:35,832 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-12-14 12:31:35,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:35,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-12-14 12:31:35,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 12:31:35,833 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:35,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:31:35,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:31:35,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash 458594166, now seen corresponding path program 1 times [2022-12-14 12:31:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388842538] [2022-12-14 12:31:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:31:35,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388842538] [2022-12-14 12:31:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388842538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837358790] [2022-12-14 12:31:35,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:35,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:35,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:35,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:35,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:31:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:31:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:31:36,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:31:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837358790] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:36,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139648379] [2022-12-14 12:31:36,078 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:31:36,079 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:36,081 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:36,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:36,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,175 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 12:31:36,176 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 [2022-12-14 12:31:36,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,238 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 12:31:36,239 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 [2022-12-14 12:31:36,302 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 8 treesize of output 7 [2022-12-14 12:31:36,312 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 8 treesize of output 7 [2022-12-14 12:31:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:36,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 129 [2022-12-14 12:31:36,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:36,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 69 [2022-12-14 12:31:36,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2022-12-14 12:31:36,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:31:36,495 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 [2022-12-14 12:31:36,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:36,524 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:31:36,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-14 12:31:36,535 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 8 treesize of output 7 [2022-12-14 12:31:36,546 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 8 treesize of output 7 [2022-12-14 12:31:36,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:31:36,642 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:36,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '120#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem6#1| 1)) 1 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:36,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:36,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:36,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 12:31:36,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732211615] [2022-12-14 12:31:36,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:36,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:31:36,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:31:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:31:36,788 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:36,830 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-14 12:31:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:31:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 12:31:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:36,831 INFO L225 Difference]: With dead ends: 32 [2022-12-14 12:31:36,831 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 12:31:36,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:31:36,832 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:36,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:31:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 12:31:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-12-14 12:31:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-14 12:31:36,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2022-12-14 12:31:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:36,835 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-14 12:31:36,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-14 12:31:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 12:31:36,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:36,836 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 12:31:36,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:31:37,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:37,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash 164245513, now seen corresponding path program 2 times [2022-12-14 12:31:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007759480] [2022-12-14 12:31:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:31:37,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007759480] [2022-12-14 12:31:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007759480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:37,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814360706] [2022-12-14 12:31:37,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:31:37,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:37,248 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:37,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:31:37,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:31:37,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:37,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:31:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:31:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:31:37,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814360706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:37,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555337850] [2022-12-14 12:31:37,389 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:31:37,389 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:37,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:37,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:37,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:37,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,430 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 12:31:37,430 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 [2022-12-14 12:31:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,467 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 12:31:37,468 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 [2022-12-14 12:31:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 85 [2022-12-14 12:31:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:37,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 50 treesize of output 34 [2022-12-14 12:31:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:31:37,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:31:37,562 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:31:37,600 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 8 treesize of output 7 [2022-12-14 12:31:37,606 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 8 treesize of output 7 [2022-12-14 12:31:37,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:37,634 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:31:37,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-14 12:31:37,644 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 [2022-12-14 12:31:37,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:31:37,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:37,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '298#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem6#1| 1)) 1 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:37,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:37,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:37,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2022-12-14 12:31:37,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606867100] [2022-12-14 12:31:37,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:37,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:31:37,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:37,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:31:37,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:31:37,837 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:37,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:37,904 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-12-14 12:31:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:31:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 12:31:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:37,906 INFO L225 Difference]: With dead ends: 59 [2022-12-14 12:31:37,906 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 12:31:37,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:31:37,906 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:37,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 16 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 12:31:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2022-12-14 12:31:37,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:37,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-12-14 12:31:37,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 16 [2022-12-14 12:31:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:37,911 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-12-14 12:31:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:37,912 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-12-14 12:31:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 12:31:37,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:37,912 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 5, 5, 1, 1, 1, 1, 1] [2022-12-14 12:31:37,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:31:38,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 12:31:38,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 627172141, now seen corresponding path program 3 times [2022-12-14 12:31:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:38,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406382611] [2022-12-14 12:31:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:31:38,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406382611] [2022-12-14 12:31:38,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406382611] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288346294] [2022-12-14 12:31:38,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:31:38,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:38,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:38,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:31:38,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:31:38,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:31:38,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 12:31:38,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:31:38,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 12:31:38,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288346294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979056502] [2022-12-14 12:31:38,485 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:31:38,485 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:38,485 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:38,485 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:38,485 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,527 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 12:31:38,528 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 [2022-12-14 12:31:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,566 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 12:31:38,566 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 [2022-12-14 12:31:38,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:31:38,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 12:31:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 90 [2022-12-14 12:31:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:38,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 35 [2022-12-14 12:31:38,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:31:38,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 12:31:38,688 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 [2022-12-14 12:31:38,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:38,710 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:31:38,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-14 12:31:38,723 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 8 treesize of output 7 [2022-12-14 12:31:38,731 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 8 treesize of output 7 [2022-12-14 12:31:38,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:31:38,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:38,910 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '632#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem6#1| 1)) 1 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:38,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:38,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:38,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-14 12:31:38,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284448223] [2022-12-14 12:31:38,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 12:31:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 12:31:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:31:38,913 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:38,985 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-12-14 12:31:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 12:31:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 31 [2022-12-14 12:31:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:38,987 INFO L225 Difference]: With dead ends: 78 [2022-12-14 12:31:38,987 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 12:31:38,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-12-14 12:31:38,989 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:38,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 12:31:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-12-14 12:31:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:38,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-12-14 12:31:38,997 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 31 [2022-12-14 12:31:38,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:38,997 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-12-14 12:31:38,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-12-14 12:31:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 12:31:39,000 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:39,000 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1] [2022-12-14 12:31:39,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:31:39,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:39,202 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1866066697, now seen corresponding path program 4 times [2022-12-14 12:31:39,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:39,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661468638] [2022-12-14 12:31:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 12:31:39,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:39,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661468638] [2022-12-14 12:31:39,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661468638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:39,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323102634] [2022-12-14 12:31:39,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:31:39,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:39,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:39,611 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:39,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:31:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:39,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 12:31:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:31:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 12:31:39,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:31:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 12:31:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323102634] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:31:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150731785] [2022-12-14 12:31:39,924 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 12:31:39,924 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:31:39,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:31:39,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:31:39,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:31:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,958 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 12:31:39,958 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 [2022-12-14 12:31:39,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:39,985 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 12:31:39,986 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 [2022-12-14 12:31:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:40,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:40,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:40,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 129 [2022-12-14 12:31:40,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:31:40,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 64 [2022-12-14 12:31:40,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2022-12-14 12:31:40,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 12:31:40,074 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 8 treesize of output 7 [2022-12-14 12:31:40,081 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 12:31:40,117 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 [2022-12-14 12:31:40,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:31:40,144 INFO L321 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-12-14 12:31:40,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 53 [2022-12-14 12:31:40,152 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 8 treesize of output 7 [2022-12-14 12:31:40,161 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 8 treesize of output 7 [2022-12-14 12:31:40,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 12:31:40,212 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:31:40,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1176#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem6#1| 1)) 1 0)) (= 15000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem6#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 12:31:40,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:31:40,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:31:40,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 29 [2022-12-14 12:31:40,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14626965] [2022-12-14 12:31:40,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:31:40,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 12:31:40,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:31:40,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 12:31:40,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=670, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:31:40,372 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:31:40,541 INFO L93 Difference]: Finished difference Result 153 states and 183 transitions. [2022-12-14 12:31:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 12:31:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 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 54 [2022-12-14 12:31:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:31:40,542 INFO L225 Difference]: With dead ends: 153 [2022-12-14 12:31:40,542 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 12:31:40,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=452, Invalid=670, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 12:31:40,544 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:31:40,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 8 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:31:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 12:31:40,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2022-12-14 12:31:40,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-12-14 12:31:40,552 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 54 [2022-12-14 12:31:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:31:40,552 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-12-14 12:31:40,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:31:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-12-14 12:31:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 12:31:40,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:31:40,554 INFO L195 NwaCegarLoop]: trace histogram [26, 14, 13, 13, 1, 1, 1, 1, 1] [2022-12-14 12:31:40,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:31:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:40,756 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:31:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:31:40,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1450272301, now seen corresponding path program 5 times [2022-12-14 12:31:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:31:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759056760] [2022-12-14 12:31:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:31:40,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:31:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:31:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 12:31:41,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:31:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759056760] [2022-12-14 12:31:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759056760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:31:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133917914] [2022-12-14 12:31:41,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:31:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:31:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:31:41,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:31:41,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63937109-4af6-40a3-b152-ae7a806b2cef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process