./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/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_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/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_e6de0f4b-5fcf-4057-9511-80e1b51167a9/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 fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 --- 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 06:35:44,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:35:44,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:35:44,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:35:44,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:35:44,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:35:44,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:35:44,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:35:44,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:35:44,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:35:44,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:35:44,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:35:44,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:35:44,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:35:44,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:35:44,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:35:44,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:35:44,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:35:44,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:35:44,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:35:44,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:35:44,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:35:44,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:35:44,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:35:44,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:35:44,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:35:44,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:35:44,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:35:44,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:35:44,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:35:44,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:35:44,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:35:44,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:35:44,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:35:44,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:35:44,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:35:44,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:35:44,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:35:44,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:35:44,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:35:44,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:35:44,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:35:44,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:35:44,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:35:44,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:35:44,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:35:44,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:35:44,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:35:44,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:35:44,165 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:35:44,165 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:35:44,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:35:44,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:35:44,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:35:44,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:35:44,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:35:44,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:35:44,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:35:44,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:35:44,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:35:44,168 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_e6de0f4b-5fcf-4057-9511-80e1b51167a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 [2022-12-14 06:35:44,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:35:44,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:35:44,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:35:44,355 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:35:44,355 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:35:44,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-programs/copysome1-2.i [2022-12-14 06:35:46,819 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:35:46,983 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:35:46,984 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/sv-benchmarks/c/array-programs/copysome1-2.i [2022-12-14 06:35:46,989 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/data/f29dae786/cd68743973f543b791e9cb60e9077a61/FLAGa009db2f0 [2022-12-14 06:35:47,395 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/data/f29dae786/cd68743973f543b791e9cb60e9077a61 [2022-12-14 06:35:47,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:35:47,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:35:47,400 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:35:47,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:35:47,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:35:47,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12fd691e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47, skipping insertion in model container [2022-12-14 06:35:47,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:35:47,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:35:47,531 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_e6de0f4b-5fcf-4057-9511-80e1b51167a9/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2022-12-14 06:35:47,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:35:47,551 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:35:47,560 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_e6de0f4b-5fcf-4057-9511-80e1b51167a9/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2022-12-14 06:35:47,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:35:47,578 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:35:47,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47 WrapperNode [2022-12-14 06:35:47,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:35:47,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:35:47,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:35:47,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:35:47,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,604 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-12-14 06:35:47,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:35:47,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:35:47,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:35:47,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:35:47,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:35:47,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:35:47,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:35:47,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:35:47,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (1/1) ... [2022-12-14 06:35:47,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:35:47,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:47,651 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:35:47,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:35:47,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 06:35:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:35:47,734 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:35:47,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:35:47,839 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:35:47,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:35:47,864 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 06:35:47,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:35:47 BoogieIcfgContainer [2022-12-14 06:35:47,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:35:47,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:35:47,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:35:47,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:35:47,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:35:47" (1/3) ... [2022-12-14 06:35:47,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc1b077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:35:47, skipping insertion in model container [2022-12-14 06:35:47,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:35:47" (2/3) ... [2022-12-14 06:35:47,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc1b077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:35:47, skipping insertion in model container [2022-12-14 06:35:47,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:35:47" (3/3) ... [2022-12-14 06:35:47,872 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2022-12-14 06:35:47,886 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:35:47,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:35:47,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:35:47,926 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;@72498f0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:35:47,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:35:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:35:47,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:47,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:47,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1604077452, now seen corresponding path program 1 times [2022-12-14 06:35:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:47,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061833366] [2022-12-14 06:35:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:48,148 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 06:35:48,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:48,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061833366] [2022-12-14 06:35:48,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061833366] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:35:48,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:35:48,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 06:35:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532345345] [2022-12-14 06:35:48,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:35:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:35:48,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:35:48,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:35:48,187 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:48,223 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-12-14 06:35:48,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:35:48,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:35:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:48,233 INFO L225 Difference]: With dead ends: 22 [2022-12-14 06:35:48,233 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 06:35:48,236 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 06:35:48,240 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:48,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 06:35:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 06:35:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-12-14 06:35:48,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-12-14 06:35:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:48,272 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-12-14 06:35:48,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-12-14 06:35:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:35:48,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:48,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:48,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:35:48,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash 497478411, now seen corresponding path program 1 times [2022-12-14 06:35:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578707469] [2022-12-14 06:35:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:35:48,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578707469] [2022-12-14 06:35:48,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578707469] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:48,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916022097] [2022-12-14 06:35:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:48,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:48,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:48,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:35:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:48,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:35:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:35:48,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:35:48,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916022097] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:48,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298086794] [2022-12-14 06:35:48,498 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:35:48,498 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:48,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:48,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:48,506 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,607 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:35:48,608 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 06:35:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,670 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:35:48,671 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 06:35:48,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,719 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 42 treesize of output 35 [2022-12-14 06:35:48,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:48,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:48,888 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:35:48,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 290 treesize of output 280 [2022-12-14 06:35:49,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:49,188 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:35:49,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:35:49,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:49,221 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:49,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:49,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:49,256 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:49,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:49,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:49,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '118#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:49,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:49,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:49,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 06:35:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426857392] [2022-12-14 06:35:49,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:49,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 06:35:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:49,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 06:35:49,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:35:49,433 INFO L87 Difference]: Start difference. First operand 12 states and 15 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 06:35:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:49,464 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-12-14 06:35:49,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:35:49,464 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 9 [2022-12-14 06:35:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:49,465 INFO L225 Difference]: With dead ends: 27 [2022-12-14 06:35:49,465 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 06:35:49,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:35:49,467 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:49,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:49,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 06:35:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 06:35:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 06:35:49,471 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2022-12-14 06:35:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:49,471 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 06:35:49,472 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 06:35:49,472 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 06:35:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:35:49,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:49,472 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:49,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:35:49,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:49,674 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash -167070516, now seen corresponding path program 2 times [2022-12-14 06:35:49,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:49,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258936036] [2022-12-14 06:35:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:35:49,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:49,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258936036] [2022-12-14 06:35:49,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258936036] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:49,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019931115] [2022-12-14 06:35:49,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:35:49,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:49,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:49,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:49,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:35:50,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:35:50,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:35:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:35:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:35:50,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019931115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:50,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963039201] [2022-12-14 06:35:50,079 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:35:50,079 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:50,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:50,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:50,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:50,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,120 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:35:50,120 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 06:35:50,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,161 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:35:50,161 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 06:35:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,188 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 42 treesize of output 35 [2022-12-14 06:35:50,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:50,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,292 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:35:50,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 290 treesize of output 280 [2022-12-14 06:35:50,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,506 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:35:50,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:35:50,525 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:35:50,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:35:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,577 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 06:35:50,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-12-14 06:35:50,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:50,624 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:50,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:50,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:50,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:50,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:50,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:50,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 06:35:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089496582] [2022-12-14 06:35:50,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:50,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:35:50,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:35:50,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:35:50,765 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:50,811 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2022-12-14 06:35:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 06:35:50,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 06:35:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:50,812 INFO L225 Difference]: With dead ends: 42 [2022-12-14 06:35:50,812 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 06:35:50,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:35:50,814 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:50,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:35:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 06:35:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 06:35:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:50,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-12-14 06:35:50,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2022-12-14 06:35:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:50,819 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-12-14 06:35:50,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-12-14 06:35:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:35:50,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:50,820 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:50,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:35:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:51,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1219165012, now seen corresponding path program 3 times [2022-12-14 06:35:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:51,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323714050] [2022-12-14 06:35:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 06:35:51,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323714050] [2022-12-14 06:35:51,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323714050] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274298648] [2022-12-14 06:35:51,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:35:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:51,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:51,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:35:51,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:35:51,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:35:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:35:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 06:35:51,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 06:35:51,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274298648] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565701297] [2022-12-14 06:35:51,491 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:35:51,491 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:51,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:51,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:51,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,526 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:35:51,527 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 06:35:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,564 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:35:51,565 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 06:35:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,593 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 42 treesize of output 35 [2022-12-14 06:35:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,711 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:35:51,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 290 treesize of output 280 [2022-12-14 06:35:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,889 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:35:51,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:35:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,912 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:51,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:51,941 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:51,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:51,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:52,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:52,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:52,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:52,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 06:35:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032014436] [2022-12-14 06:35:52,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:52,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:35:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:35:52,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=501, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:35:52,299 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:52,396 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2022-12-14 06:35:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:35:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:35:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:52,397 INFO L225 Difference]: With dead ends: 72 [2022-12-14 06:35:52,397 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 06:35:52,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=501, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:35:52,399 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:52,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:35:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 06:35:52,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 06:35:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 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 06:35:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-12-14 06:35:52,403 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 27 [2022-12-14 06:35:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:52,403 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-12-14 06:35:52,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:35:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-12-14 06:35:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 06:35:52,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:52,404 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:52,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:35:52,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:52,606 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:52,607 INFO L85 PathProgramCache]: Analyzing trace with hash 854252652, now seen corresponding path program 4 times [2022-12-14 06:35:52,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929572595] [2022-12-14 06:35:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:52,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 06:35:53,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:53,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929572595] [2022-12-14 06:35:53,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929572595] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098058769] [2022-12-14 06:35:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:35:53,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:53,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:53,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:35:53,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:53,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:35:53,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:35:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 06:35:53,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:35:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 06:35:53,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098058769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:35:53,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10836211] [2022-12-14 06:35:53,938 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:35:53,938 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:35:53,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:35:53,938 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:35:53,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:35:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,973 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 06:35:53,974 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 06:35:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,011 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 06:35:54,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 06:35:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,035 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 42 treesize of output 35 [2022-12-14 06:35:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:35:54,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,135 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-12-14 06:35:54,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 290 treesize of output 280 [2022-12-14 06:35:54,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,311 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 06:35:54,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-12-14 06:35:54,327 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:35:54,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 06:35:54,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,390 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 06:35:54,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-12-14 06:35:54,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:35:54,442 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:35:54,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 06:35:54,455 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:35:54,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1183#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:35:54,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:35:54,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:35:54,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 06:35:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314439429] [2022-12-14 06:35:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:35:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 06:35:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:35:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 06:35:54,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=1569, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:35:54,587 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 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 06:35:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:35:54,738 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2022-12-14 06:35:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 06:35:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 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 51 [2022-12-14 06:35:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:35:54,739 INFO L225 Difference]: With dead ends: 132 [2022-12-14 06:35:54,739 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 06:35:54,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1187, Invalid=1569, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:35:54,740 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:35:54,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:35:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 06:35:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-12-14 06:35:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 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 06:35:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-12-14 06:35:54,750 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 51 [2022-12-14 06:35:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:35:54,750 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-12-14 06:35:54,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 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 06:35:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-12-14 06:35:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 06:35:54,752 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:35:54,752 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:35:54,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:35:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:54,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:35:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:35:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash 292776940, now seen corresponding path program 5 times [2022-12-14 06:35:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:35:54,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116344603] [2022-12-14 06:35:54,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:35:54,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:35:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:35:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 06:35:56,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:35:56,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116344603] [2022-12-14 06:35:56,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116344603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:35:56,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633068313] [2022-12-14 06:35:56,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:35:56,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:35:56,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:35:56,781 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:35:56,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6de0f4b-5fcf-4057-9511-80e1b51167a9/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process