./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c --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_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/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_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/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_a8b6f842-1e64-4840-ad32-1addbd5f0767/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 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac --- 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 04:48:27,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 04:48:27,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 04:48:27,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 04:48:27,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 04:48:27,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 04:48:27,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 04:48:27,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 04:48:27,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 04:48:27,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 04:48:27,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 04:48:27,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 04:48:27,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 04:48:27,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 04:48:27,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 04:48:27,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 04:48:27,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 04:48:27,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 04:48:27,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 04:48:27,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 04:48:27,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 04:48:27,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 04:48:27,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 04:48:27,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 04:48:27,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 04:48:27,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 04:48:27,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 04:48:27,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 04:48:27,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 04:48:27,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 04:48:27,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 04:48:27,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 04:48:27,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 04:48:27,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 04:48:27,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 04:48:27,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 04:48:27,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 04:48:27,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 04:48:27,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 04:48:27,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 04:48:27,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 04:48:27,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 04:48:27,164 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 04:48:27,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 04:48:27,164 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 04:48:27,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 04:48:27,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 04:48:27,165 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 04:48:27,165 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 04:48:27,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 04:48:27,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 04:48:27,167 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 04:48:27,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 04:48:27,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 04:48:27,167 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 04:48:27,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 04:48:27,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 04:48:27,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 04:48:27,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:48:27,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 04:48:27,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 04:48:27,170 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_a8b6f842-1e64-4840-ad32-1addbd5f0767/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94a3c9718d8b0819c3a22a45f77fd4dac96406e3aa7eff964888695d6121efac [2022-12-14 04:48:27,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 04:48:27,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 04:48:27,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 04:48:27,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 04:48:27,378 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 04:48:27,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-12-14 04:48:30,036 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 04:48:30,149 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 04:48:30,150 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c [2022-12-14 04:48:30,154 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/data/21119b701/d607556f8d4443eab267f5135b20e188/FLAG0f03571a7 [2022-12-14 04:48:30,163 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/data/21119b701/d607556f8d4443eab267f5135b20e188 [2022-12-14 04:48:30,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 04:48:30,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 04:48:30,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 04:48:30,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 04:48:30,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 04:48:30,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@690a742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30, skipping insertion in model container [2022-12-14 04:48:30,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 04:48:30,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 04:48:30,286 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_a8b6f842-1e64-4840-ad32-1addbd5f0767/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2022-12-14 04:48:30,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:48:30,303 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 04:48:30,312 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_a8b6f842-1e64-4840-ad32-1addbd5f0767/sv-benchmarks/c/array-cav19/array_init_pair_symmetr.c[414,427] [2022-12-14 04:48:30,316 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 04:48:30,326 INFO L208 MainTranslator]: Completed translation [2022-12-14 04:48:30,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30 WrapperNode [2022-12-14 04:48:30,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 04:48:30,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 04:48:30,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 04:48:30,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 04:48:30,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,349 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2022-12-14 04:48:30,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 04:48:30,350 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 04:48:30,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 04:48:30,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 04:48:30,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,366 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 04:48:30,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 04:48:30,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 04:48:30,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 04:48:30,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (1/1) ... [2022-12-14 04:48:30,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 04:48:30,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:30,389 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 04:48:30,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 04:48:30,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 04:48:30,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 04:48:30,477 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 04:48:30,479 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 04:48:30,582 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 04:48:30,623 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 04:48:30,623 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 04:48:30,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:48:30 BoogieIcfgContainer [2022-12-14 04:48:30,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 04:48:30,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 04:48:30,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 04:48:30,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 04:48:30,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:48:30" (1/3) ... [2022-12-14 04:48:30,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f6f428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:48:30, skipping insertion in model container [2022-12-14 04:48:30,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:48:30" (2/3) ... [2022-12-14 04:48:30,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f6f428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:48:30, skipping insertion in model container [2022-12-14 04:48:30,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:48:30" (3/3) ... [2022-12-14 04:48:30,635 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr.c [2022-12-14 04:48:30,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 04:48:30,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 04:48:30,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 04:48:30,708 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;@17084c5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 04:48:30,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 04:48:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 04:48:30,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:30,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 04:48:30,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1387171958, now seen corresponding path program 1 times [2022-12-14 04:48:30,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:30,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554305387] [2022-12-14 04:48:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:30,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:30,963 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 04:48:30,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:30,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554305387] [2022-12-14 04:48:30,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554305387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:30,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:48:30,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 04:48:30,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833819357] [2022-12-14 04:48:30,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 04:48:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 04:48:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 04:48:31,023 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:31,070 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 04:48:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 04:48:31,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 04:48:31,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:31,077 INFO L225 Difference]: With dead ends: 17 [2022-12-14 04:48:31,077 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 04:48:31,079 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 04:48:31,081 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:31,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:48:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 04:48:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 04:48:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 04:48:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 04:48:31,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 04:48:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:31,106 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 04:48:31,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 04:48:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 04:48:31,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:31,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:31,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 04:48:31,107 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:31,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:31,108 INFO L85 PathProgramCache]: Analyzing trace with hash -110753083, now seen corresponding path program 1 times [2022-12-14 04:48:31,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:31,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976463291] [2022-12-14 04:48:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:48:31,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976463291] [2022-12-14 04:48:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976463291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 04:48:31,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 04:48:31,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 04:48:31,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631688343] [2022-12-14 04:48:31,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 04:48:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 04:48:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 04:48:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:48:31,197 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 04:48:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:31,219 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-12-14 04:48:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 04:48:31,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 04:48:31,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:31,220 INFO L225 Difference]: With dead ends: 15 [2022-12-14 04:48:31,220 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 04:48:31,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 04:48:31,221 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:31,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:48:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 04:48:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 04:48:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 04:48:31,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 04:48:31,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 04:48:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 04:48:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 04:48:31,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 04:48:31,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:31,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 04:48:31,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 849702428, now seen corresponding path program 1 times [2022-12-14 04:48:31,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:31,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449936021] [2022-12-14 04:48:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:31,330 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 04:48:31,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:31,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449936021] [2022-12-14 04:48:31,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449936021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:31,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871598523] [2022-12-14 04:48:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:31,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:31,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:31,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:31,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 04:48:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:31,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:48:31,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:31,444 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 04:48:31,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:31,462 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 04:48:31,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871598523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:31,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1250026090] [2022-12-14 04:48:31,483 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:48:31,483 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:31,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:31,492 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:31,492 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,673 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:48:31,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:48:31,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 04:48:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 04:48:31,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:31,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:31,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:31,997 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-12-14 04:48:31,997 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 436 treesize of output 435 [2022-12-14 04:48:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:32,271 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:48:32,272 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 43 treesize of output 31 [2022-12-14 04:48:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:32,329 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:32,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:32,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:32,414 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:32,460 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:32,633 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '141#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:48:32,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:32,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-14 04:48:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622013338] [2022-12-14 04:48:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 04:48:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 04:48:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:48:32,635 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 04:48:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:32,658 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-12-14 04:48:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 04:48:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 8 [2022-12-14 04:48:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:32,659 INFO L225 Difference]: With dead ends: 20 [2022-12-14 04:48:32,659 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 04:48:32,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-12-14 04:48:32,660 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:32,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:48:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 04:48:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 04:48:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 04:48:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 04:48:32,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2022-12-14 04:48:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:32,663 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 04:48:32,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 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 04:48:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 04:48:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 04:48:32,664 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:32,664 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:32,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 04:48:32,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:32,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:32,867 INFO L85 PathProgramCache]: Analyzing trace with hash 193659703, now seen corresponding path program 2 times [2022-12-14 04:48:32,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:32,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18182657] [2022-12-14 04:48:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:32,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 04:48:33,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:33,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18182657] [2022-12-14 04:48:33,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18182657] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:33,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659100386] [2022-12-14 04:48:33,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:48:33,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:33,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:33,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:33,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 04:48:33,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 04:48:33,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:48:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 04:48:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 04:48:33,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 04:48:33,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659100386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:33,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [132867724] [2022-12-14 04:48:33,220 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:48:33,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:33,221 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:33,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:33,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,325 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:48:33,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:48:33,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 04:48:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 04:48:33,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:33,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,570 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-12-14 04:48:33,570 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 436 treesize of output 435 [2022-12-14 04:48:33,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,925 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:48:33,925 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 43 treesize of output 31 [2022-12-14 04:48:33,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:33,972 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:33,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:34,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:34,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:34,028 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:34,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:34,070 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:34,213 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '270#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:48:34,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:34,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:34,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2022-12-14 04:48:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067071302] [2022-12-14 04:48:34,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:34,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 04:48:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 04:48:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2022-12-14 04:48:34,216 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:34,318 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2022-12-14 04:48:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 04:48:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 04:48:34,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:34,319 INFO L225 Difference]: With dead ends: 55 [2022-12-14 04:48:34,319 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 04:48:34,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2022-12-14 04:48:34,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 116 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:34,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 27 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:48:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 04:48:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 22. [2022-12-14 04:48:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-12-14 04:48:34,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2022-12-14 04:48:34,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:34,327 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-12-14 04:48:34,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:34,327 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-12-14 04:48:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 04:48:34,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:34,328 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:34,334 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 04:48:34,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 04:48:34,530 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:34,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1909590116, now seen corresponding path program 3 times [2022-12-14 04:48:34,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977243330] [2022-12-14 04:48:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:48:34,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977243330] [2022-12-14 04:48:34,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977243330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:34,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987713655] [2022-12-14 04:48:34,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:48:34,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:34,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:34,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 04:48:34,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:48:34,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:48:34,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 04:48:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:48:35,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 04:48:35,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987713655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:35,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1331332784] [2022-12-14 04:48:35,163 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:48:35,163 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:35,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:35,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:35,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:35,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,262 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:48:35,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:48:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 04:48:35,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 04:48:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:35,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,487 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-12-14 04:48:35,488 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 436 treesize of output 435 [2022-12-14 04:48:35,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,693 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:48:35,694 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 43 treesize of output 31 [2022-12-14 04:48:35,736 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 04:48:35,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-12-14 04:48:35,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:35,788 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:35,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:35,822 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:36,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '546#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:48:36,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:36,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:36,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-12-14 04:48:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402645060] [2022-12-14 04:48:36,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:36,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 04:48:36,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:36,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 04:48:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2022-12-14 04:48:36,011 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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 04:48:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:36,242 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-12-14 04:48:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 04:48:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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 20 [2022-12-14 04:48:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:36,243 INFO L225 Difference]: With dead ends: 124 [2022-12-14 04:48:36,244 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 04:48:36,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 04:48:36,245 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 288 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:36,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 60 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 04:48:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 04:48:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 40. [2022-12-14 04:48:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-14 04:48:36,250 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2022-12-14 04:48:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:36,250 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-14 04:48:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 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 04:48:36,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-14 04:48:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 04:48:36,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:36,251 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:36,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 04:48:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:36,452 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 726013834, now seen corresponding path program 4 times [2022-12-14 04:48:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138014473] [2022-12-14 04:48:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 04:48:37,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138014473] [2022-12-14 04:48:37,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138014473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:37,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677032152] [2022-12-14 04:48:37,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:48:37,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:37,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:37,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:37,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 04:48:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:48:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 04:48:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 04:48:37,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677032152] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:37,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759950226] [2022-12-14 04:48:37,570 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:48:37,570 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:37,570 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:37,570 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:37,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:37,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,639 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-12-14 04:48:37,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-12-14 04:48:37,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,731 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:48:37,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:48:37,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 04:48:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:37,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:37,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:37,885 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-12-14 04:48:37,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-12-14 04:48:37,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:37,966 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:48:37,966 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 43 treesize of output 31 [2022-12-14 04:48:37,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:38,015 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:38,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:38,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:38,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:38,068 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:38,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:38,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:38,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:48:38,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:38,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:38,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-12-14 04:48:38,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192423751] [2022-12-14 04:48:38,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:38,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 04:48:38,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 04:48:38,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:48:38,266 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:38,323 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2022-12-14 04:48:38,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 04:48:38,323 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 04:48:38,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:38,324 INFO L225 Difference]: With dead ends: 80 [2022-12-14 04:48:38,324 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 04:48:38,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1419, Invalid=1773, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 04:48:38,325 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:38,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 04:48:38,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 04:48:38,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-14 04:48:38,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 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 04:48:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-12-14 04:48:38,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 38 [2022-12-14 04:48:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:38,334 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-12-14 04:48:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 04:48:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-12-14 04:48:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 04:48:38,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:38,335 INFO L195 NwaCegarLoop]: trace histogram [34, 16, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:38,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 04:48:38,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:38,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1878074902, now seen corresponding path program 5 times [2022-12-14 04:48:38,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251098120] [2022-12-14 04:48:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 04:48:39,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251098120] [2022-12-14 04:48:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251098120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243529422] [2022-12-14 04:48:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:48:39,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:39,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:39,883 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:39,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 04:48:45,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 04:48:45,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:48:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 04:48:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:48:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-12-14 04:48:46,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:48:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-12-14 04:48:46,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243529422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:48:46,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1947411383] [2022-12-14 04:48:46,756 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:48:46,757 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:48:46,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:48:46,757 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:48:46,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:48:46,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,844 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:48:46,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:48:46,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 04:48:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 04:48:46,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:48:46,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:46,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,020 INFO L321 Elim1Store]: treesize reduction 243, result has 15.9 percent of original size [2022-12-14 04:48:47,020 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 436 treesize of output 435 [2022-12-14 04:48:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,324 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:48:47,324 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 43 treesize of output 31 [2022-12-14 04:48:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,363 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:47,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:48:47,416 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:48:47,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:48:47,446 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:48:48,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:48:48,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:48:48,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:48:48,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19, 19] total 72 [2022-12-14 04:48:48,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219449615] [2022-12-14 04:48:48,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:48:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 04:48:48,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:48:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 04:48:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=3223, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 04:48:48,006 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 04:48:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:48:49,355 INFO L93 Difference]: Finished difference Result 385 states and 442 transitions. [2022-12-14 04:48:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 04:48:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 56 [2022-12-14 04:48:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:48:49,357 INFO L225 Difference]: With dead ends: 385 [2022-12-14 04:48:49,357 INFO L226 Difference]: Without dead ends: 363 [2022-12-14 04:48:49,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 110 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4729, Invalid=7703, Unknown=0, NotChecked=0, Total=12432 [2022-12-14 04:48:49,359 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1053 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 04:48:49,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 177 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 04:48:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-14 04:48:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 112. [2022-12-14 04:48:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 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 04:48:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-12-14 04:48:49,369 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 56 [2022-12-14 04:48:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:48:49,369 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-12-14 04:48:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 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 04:48:49,370 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-12-14 04:48:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 04:48:49,371 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:48:49,371 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2022-12-14 04:48:49,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 04:48:49,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:49,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:48:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:48:49,574 INFO L85 PathProgramCache]: Analyzing trace with hash -98618998, now seen corresponding path program 6 times [2022-12-14 04:48:49,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:48:49,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097985634] [2022-12-14 04:48:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:48:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:48:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:48:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-12-14 04:48:51,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:48:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097985634] [2022-12-14 04:48:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097985634] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:48:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928686641] [2022-12-14 04:48:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 04:48:51,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:48:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:48:51,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:48:51,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 04:54:10,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 04:54:10,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 04:54:10,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-14 04:54:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-12-14 04:54:11,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-12-14 04:54:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928686641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:13,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75497829] [2022-12-14 04:54:13,785 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:54:13,785 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:13,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:13,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:13,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:13,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,849 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-12-14 04:54:13,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-12-14 04:54:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,929 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:54:13,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:54:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:13,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 04:54:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:14,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:14,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:14,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:14,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:14,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:14,063 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-12-14 04:54:14,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-12-14 04:54:14,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:14,146 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:54:14,147 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 43 treesize of output 31 [2022-12-14 04:54:14,196 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-12-14 04:54:14,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-12-14 04:54:14,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:14,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:14,242 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:54:14,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:54:14,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:14,425 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3439#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:54:14,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:14,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:14,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 162 [2022-12-14 04:54:14,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937779242] [2022-12-14 04:54:14,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-12-14 04:54:14,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-12-14 04:54:14,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12160, Invalid=15562, Unknown=0, NotChecked=0, Total=27722 [2022-12-14 04:54:14,437 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 04:54:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:20,594 INFO L93 Difference]: Finished difference Result 799 states and 910 transitions. [2022-12-14 04:54:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-12-14 04:54:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 110 [2022-12-14 04:54:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:20,599 INFO L225 Difference]: With dead ends: 799 [2022-12-14 04:54:20,599 INFO L226 Difference]: Without dead ends: 741 [2022-12-14 04:54:20,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18434 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=18202, Invalid=29978, Unknown=0, NotChecked=0, Total=48180 [2022-12-14 04:54:20,603 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2263 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2263 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:20,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2263 Valid, 408 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 04:54:20,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-12-14 04:54:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 220. [2022-12-14 04:54:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 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 04:54:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-12-14 04:54:20,620 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 110 [2022-12-14 04:54:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:20,621 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-12-14 04:54:20,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.049079754601227) internal successors, (171), 162 states have internal predecessors, (171), 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 04:54:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-12-14 04:54:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-14 04:54:20,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:20,623 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:20,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 04:54:20,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 04:54:20,824 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:20,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1978675062, now seen corresponding path program 7 times [2022-12-14 04:54:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:20,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774989236] [2022-12-14 04:54:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-12-14 04:54:29,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:54:29,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774989236] [2022-12-14 04:54:29,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774989236] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:54:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058967105] [2022-12-14 04:54:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 04:54:29,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:54:29,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:54:29,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:54:29,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 04:54:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:54:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 3157 conjuncts, 109 conjunts are in the unsatisfiable core [2022-12-14 04:54:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 04:54:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-12-14 04:54:32,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 04:54:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-12-14 04:54:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058967105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 04:54:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933326730] [2022-12-14 04:54:42,364 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 04:54:42,364 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 04:54:42,364 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 04:54:42,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 04:54:42,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 04:54:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,428 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-12-14 04:54:42,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-12-14 04:54:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-12-14 04:54:42,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 04:54:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 04:54:42,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,597 INFO L321 Elim1Store]: treesize reduction 139, result has 12.6 percent of original size [2022-12-14 04:54:42,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 446 treesize of output 433 [2022-12-14 04:54:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,701 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-12-14 04:54:42,702 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 43 treesize of output 31 [2022-12-14 04:54:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,749 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:54:42,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:54:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 04:54:42,800 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-12-14 04:54:42,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 04:54:42,826 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 04:54:43,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6782#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem10#1| 0) 1 0)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-12-14 04:54:43,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 04:54:43,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 04:54:43,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 322 [2022-12-14 04:54:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351261845] [2022-12-14 04:54:43,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 04:54:43,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 323 states [2022-12-14 04:54:43,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 04:54:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 323 interpolants. [2022-12-14 04:54:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2022-12-14 04:54:43,066 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 04:54:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 04:54:43,691 INFO L93 Difference]: Finished difference Result 440 states and 551 transitions. [2022-12-14 04:54:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-12-14 04:54:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 218 [2022-12-14 04:54:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 04:54:43,693 INFO L225 Difference]: With dead ends: 440 [2022-12-14 04:54:43,693 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 04:54:43,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47918 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=47409, Invalid=59193, Unknown=0, NotChecked=0, Total=106602 [2022-12-14 04:54:43,697 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 04:54:43,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 04:54:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 04:54:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-12-14 04:54:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.0091743119266054) internal successors, (330), 327 states have internal predecessors, (330), 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 04:54:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 330 transitions. [2022-12-14 04:54:43,715 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 330 transitions. Word has length 218 [2022-12-14 04:54:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 04:54:43,715 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 330 transitions. [2022-12-14 04:54:43,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 323 states, 323 states have (on average 1.0185758513931888) internal successors, (329), 322 states have internal predecessors, (329), 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 04:54:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 330 transitions. [2022-12-14 04:54:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-12-14 04:54:43,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 04:54:43,719 INFO L195 NwaCegarLoop]: trace histogram [214, 106, 1, 1, 1, 1, 1, 1] [2022-12-14 04:54:43,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 04:54:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 04:54:43,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 04:54:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 04:54:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash 835196618, now seen corresponding path program 8 times [2022-12-14 04:54:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 04:54:43,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678073210] [2022-12-14 04:54:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 04:54:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 04:54:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 04:55:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 28676 backedges. 0 proven. 23005 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-12-14 04:55:13,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 04:55:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678073210] [2022-12-14 04:55:13,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678073210] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 04:55:13,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456719129] [2022-12-14 04:55:13,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 04:55:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 04:55:13,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 04:55:13,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 04:55:13,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8b6f842-1e64-4840-ad32-1addbd5f0767/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process