./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba --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 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 --- 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-b5237d8 [2022-11-22 00:10:02,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:10:02,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:10:02,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:10:02,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:10:02,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:10:02,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:10:02,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:10:02,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:10:02,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:10:02,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:10:02,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:10:02,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:10:02,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:10:02,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:10:02,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:10:02,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:10:02,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:10:02,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:10:02,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:10:02,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:10:02,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:10:02,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:10:02,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:10:02,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:10:02,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:10:02,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:10:02,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:10:02,275 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:10:02,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:10:02,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:10:02,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:10:02,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:10:02,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:10:02,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:10:02,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:10:02,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:10:02,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:10:02,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:10:02,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:10:02,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:10:02,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:10:02,332 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:10:02,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:10:02,333 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:10:02,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:10:02,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:10:02,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:10:02,334 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:10:02,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:10:02,335 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:10:02,335 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:10:02,336 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:10:02,336 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:10:02,337 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:10:02,337 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:10:02,337 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:10:02,337 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:10:02,338 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:10:02,338 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:10:02,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:10:02,339 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:10:02,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:10:02,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:10:02,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:10:02,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:10:02,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:10:02,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:10:02,340 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:10:02,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:10:02,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:10:02,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:10:02,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:10:02,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:10:02,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:10:02,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:10:02,342 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:10:02,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:10:02,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:10:02,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:10:02,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:10:02,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:10:02,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:10:02,344 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_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 [2022-11-22 00:10:02,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:10:02,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:10:02,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:10:02,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:10:02,668 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:10:02,670 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2022-11-22 00:10:05,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:10:06,124 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:10:06,125 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2022-11-22 00:10:06,133 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/data/78ed405c5/8fb4001d291147b2988047550f02184e/FLAG3d4b1a8f8 [2022-11-22 00:10:06,152 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/data/78ed405c5/8fb4001d291147b2988047550f02184e [2022-11-22 00:10:06,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:10:06,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:10:06,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:10:06,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:10:06,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:10:06,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:10:06" (1/1) ... [2022-11-22 00:10:06,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30e95997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:06, skipping insertion in model container [2022-11-22 00:10:06,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:10:06" (1/1) ... [2022-11-22 00:10:06,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:10:06,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:10:06,345 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_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2022-11-22 00:10:06,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:10:07,944 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:10:07,957 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_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2022-11-22 00:10:07,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:10:07,978 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:10:07,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07 WrapperNode [2022-11-22 00:10:07,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:10:07,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:10:07,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:10:07,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:10:07,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:07,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,015 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-11-22 00:10:08,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:10:08,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:10:08,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:10:08,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:10:08,025 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:10:08,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:10:08,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:10:08,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:10:08,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (1/1) ... [2022-11-22 00:10:08,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:10:08,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:08,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:10:08,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:10:08,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:10:08,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:10:08,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:10:08,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:10:08,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:10:08,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:10:08,197 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:10:08,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:10:08,346 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:10:08,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:10:08,426 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 00:10:08,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:10:08 BoogieIcfgContainer [2022-11-22 00:10:08,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:10:08,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:10:08,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:10:08,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:10:08,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:10:06" (1/3) ... [2022-11-22 00:10:08,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef4e273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:10:08, skipping insertion in model container [2022-11-22 00:10:08,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:10:07" (2/3) ... [2022-11-22 00:10:08,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef4e273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:10:08, skipping insertion in model container [2022-11-22 00:10:08,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:10:08" (3/3) ... [2022-11-22 00:10:08,438 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2022-11-22 00:10:08,471 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:10:08,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:10:08,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:10:08,528 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;@378555f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:10:08,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:10:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 00:10:08,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:08,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 00:10:08,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 77510321, now seen corresponding path program 1 times [2022-11-22 00:10:08,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:08,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799150486] [2022-11-22 00:10:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:08,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:08,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:08,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799150486] [2022-11-22 00:10:08,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799150486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:10:08,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:10:08,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:10:08,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974075886] [2022-11-22 00:10:08,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:10:08,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:10:08,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:08,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:10:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:10:08,899 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:08,972 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-22 00:10:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:10:08,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-22 00:10:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:08,985 INFO L225 Difference]: With dead ends: 20 [2022-11-22 00:10:08,985 INFO L226 Difference]: Without dead ends: 13 [2022-11-22 00:10:08,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:10:08,996 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:08,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:10:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-22 00:10:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2022-11-22 00:10:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-22 00:10:09,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-11-22 00:10:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:09,034 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-22 00:10:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-22 00:10:09,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:10:09,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:09,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:10:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:10:09,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1900342786, now seen corresponding path program 1 times [2022-11-22 00:10:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318889160] [2022-11-22 00:10:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:09,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:09,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:09,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318889160] [2022-11-22 00:10:09,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318889160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:09,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849213201] [2022-11-22 00:10:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:09,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:09,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:09,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:09,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:10:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:09,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:10:09,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:09,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:09,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849213201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188587295] [2022-11-22 00:10:09,356 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:10:09,356 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:09,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:09,367 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:09,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:09,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:10:09,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-22 00:10:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:10:09,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 159 [2022-11-22 00:10:09,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:10:09,699 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:09,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '87#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:09,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:09,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:09,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-22 00:10:09,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029091298] [2022-11-22 00:10:09,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:09,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 00:10:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 00:10:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:10:09,806 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2022-11-22 00:10:09,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:09,846 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-22 00:10:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:10:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) Word has length 6 [2022-11-22 00:10:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:09,847 INFO L225 Difference]: With dead ends: 32 [2022-11-22 00:10:09,847 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 00:10:09,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2022-11-22 00:10:09,849 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:09,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:10:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 00:10:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2022-11-22 00:10:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-22 00:10:09,853 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2022-11-22 00:10:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:09,854 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-22 00:10:09,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 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) [2022-11-22 00:10:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-22 00:10:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 00:10:09,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:09,855 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-22 00:10:09,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:10,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:10,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:10,062 INFO L85 PathProgramCache]: Analyzing trace with hash -696147471, now seen corresponding path program 2 times [2022-11-22 00:10:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:10,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010955176] [2022-11-22 00:10:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:10,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:10,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010955176] [2022-11-22 00:10:10,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010955176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:10,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444530135] [2022-11-22 00:10:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:10:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:10,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:10,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:10,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:10:10,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 00:10:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:10:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:10,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:10,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444530135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:10,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977298220] [2022-11-22 00:10:10,330 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:10:10,330 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:10,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:10,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:10,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:10,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:10:10,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-22 00:10:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:10:10,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 159 [2022-11-22 00:10:10,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:10:10,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:10,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:10,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:10,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:10,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-22 00:10:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295715680] [2022-11-22 00:10:10,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 00:10:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:10,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 00:10:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:10:10,592 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:10,698 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-11-22 00:10:10,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 00:10:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 00:10:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:10,699 INFO L225 Difference]: With dead ends: 68 [2022-11-22 00:10:10,699 INFO L226 Difference]: Without dead ends: 63 [2022-11-22 00:10:10,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2022-11-22 00:10:10,701 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:10,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:10:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-22 00:10:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2022-11-22 00:10:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:10,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-22 00:10:10,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2022-11-22 00:10:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:10,708 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-22 00:10:10,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:10,708 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-22 00:10:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 00:10:10,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:10,709 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-22 00:10:10,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:10,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:10,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 525645521, now seen corresponding path program 3 times [2022-11-22 00:10:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:10,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997788855] [2022-11-22 00:10:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:11,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997788855] [2022-11-22 00:10:11,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997788855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548573704] [2022-11-22 00:10:11,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:10:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:11,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:11,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:11,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:10:11,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:10:11,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:11,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:10:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:11,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:11,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548573704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:11,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841488337] [2022-11-22 00:10:11,561 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:10:11,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:11,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:11,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:11,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:10:11,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-22 00:10:11,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:10:11,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 159 [2022-11-22 00:10:11,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:10:11,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:11,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:11,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:11,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:11,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-22 00:10:11,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142637400] [2022-11-22 00:10:11,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:11,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 00:10:11,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:11,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 00:10:11,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:10:11,792 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:12,056 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2022-11-22 00:10:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 00:10:12,056 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 00:10:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:12,061 INFO L225 Difference]: With dead ends: 140 [2022-11-22 00:10:12,061 INFO L226 Difference]: Without dead ends: 135 [2022-11-22 00:10:12,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2022-11-22 00:10:12,067 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:12,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:10:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-22 00:10:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2022-11-22 00:10:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-22 00:10:12,085 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2022-11-22 00:10:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:12,085 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-22 00:10:12,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:12,086 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-22 00:10:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:10:12,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:12,087 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-11-22 00:10:12,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-22 00:10:12,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash 393701521, now seen corresponding path program 4 times [2022-11-22 00:10:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:12,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255067073] [2022-11-22 00:10:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:13,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255067073] [2022-11-22 00:10:13,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255067073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234215348] [2022-11-22 00:10:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:10:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:13,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:13,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:10:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 00:10:13,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:13,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:10:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:14,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234215348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:10:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619376045] [2022-11-22 00:10:14,204 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:10:14,205 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:10:14,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:10:14,205 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:10:14,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:10:14,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:10:14,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-22 00:10:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:10:14,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 164 [2022-11-22 00:10:14,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:10:14,358 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:10:14,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '894#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:10:14,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:10:14,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:10:14,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-22 00:10:14,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376608990] [2022-11-22 00:10:14,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:10:14,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-22 00:10:14,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:10:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-22 00:10:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:10:14,513 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:15,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:10:15,102 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2022-11-22 00:10:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-22 00:10:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 00:10:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:10:15,105 INFO L225 Difference]: With dead ends: 284 [2022-11-22 00:10:15,105 INFO L226 Difference]: Without dead ends: 279 [2022-11-22 00:10:15,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 00:10:15,108 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:10:15,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:10:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-22 00:10:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2022-11-22 00:10:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-22 00:10:15,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2022-11-22 00:10:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:10:15,120 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-22 00:10:15,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:10:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-22 00:10:15,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 00:10:15,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:10:15,127 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-11-22 00:10:15,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:10:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:15,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:10:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:10:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash 569830417, now seen corresponding path program 5 times [2022-11-22 00:10:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:10:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684493304] [2022-11-22 00:10:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:10:15,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:10:15,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:10:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:17,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:10:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684493304] [2022-11-22 00:10:17,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684493304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:10:17,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268253149] [2022-11-22 00:10:17,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:10:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:10:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:10:17,536 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:10:17,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:10:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-22 00:10:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:10:58,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 00:10:58,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:10:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:10:58,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:11:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:11:01,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268253149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:11:01,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1523357593] [2022-11-22 00:11:01,458 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:11:01,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:11:01,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:11:01,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:11:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:11:01,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:11:01,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-22 00:11:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:11:01,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 164 [2022-11-22 00:11:01,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:11:01,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:11:01,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1775#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:11:01,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:11:01,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:11:01,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-22 00:11:01,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768534440] [2022-11-22 00:11:01,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:11:01,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-22 00:11:01,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:11:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-22 00:11:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 00:11:01,783 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:11:04,235 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2022-11-22 00:11:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-22 00:11:04,236 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-22 00:11:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:11:04,239 INFO L225 Difference]: With dead ends: 572 [2022-11-22 00:11:04,239 INFO L226 Difference]: Without dead ends: 567 [2022-11-22 00:11:04,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2022-11-22 00:11:04,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:11:04,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:11:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-22 00:11:04,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2022-11-22 00:11:04,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-11-22 00:11:04,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2022-11-22 00:11:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:11:04,257 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-11-22 00:11:04,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-11-22 00:11:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-22 00:11:04,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:11:04,260 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2022-11-22 00:11:04,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:11:04,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:11:04,475 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:11:04,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:11:04,476 INFO L85 PathProgramCache]: Analyzing trace with hash -836865263, now seen corresponding path program 6 times [2022-11-22 00:11:04,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:11:04,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243161792] [2022-11-22 00:11:04,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:11:04,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:11:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:11:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:11:10,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:11:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243161792] [2022-11-22 00:11:10,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243161792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:11:10,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315268902] [2022-11-22 00:11:10,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:11:10,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:11:10,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:11:10,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:11:10,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:11:10,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:11:10,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:11:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-22 00:11:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:11:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:11:11,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:11:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:11:22,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315268902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:11:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454733470] [2022-11-22 00:11:22,298 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:11:22,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:11:22,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:11:22,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:11:22,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:11:22,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:11:22,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-22 00:11:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:11:22,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 164 [2022-11-22 00:11:22,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:11:22,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:11:22,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3520#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:11:22,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:11:22,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:11:22,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-22 00:11:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606647415] [2022-11-22 00:11:22,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:11:22,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-22 00:11:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:11:22,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-22 00:11:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-11-22 00:11:22,627 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:11:44,086 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2022-11-22 00:11:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-22 00:11:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 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 99 [2022-11-22 00:11:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:11:44,091 INFO L225 Difference]: With dead ends: 1148 [2022-11-22 00:11:44,091 INFO L226 Difference]: Without dead ends: 1143 [2022-11-22 00:11:44,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2022-11-22 00:11:44,096 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:11:44,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 00:11:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-11-22 00:11:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2022-11-22 00:11:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2022-11-22 00:11:44,119 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2022-11-22 00:11:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:11:44,119 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2022-11-22 00:11:44,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:11:44,120 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2022-11-22 00:11:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-22 00:11:44,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:11:44,125 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2022-11-22 00:11:44,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:11:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:11:44,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:11:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:11:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1257275119, now seen corresponding path program 7 times [2022-11-22 00:11:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:11:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129348499] [2022-11-22 00:11:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:11:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:11:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:12:06,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:12:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129348499] [2022-11-22 00:12:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129348499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:12:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135132555] [2022-11-22 00:12:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:12:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:12:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:12:06,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:12:06,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:12:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:12:06,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-22 00:12:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:12:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:12:07,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:12:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:12:51,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135132555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:12:51,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2003585322] [2022-11-22 00:12:51,059 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 00:12:51,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:12:51,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:12:51,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:12:51,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:12:51,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:12:51,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-22 00:12:51,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:12:51,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 159 [2022-11-22 00:12:51,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:12:51,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:12:51,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6993#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem3#1| 10) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem3#1|) (= |#NULL.base| 0))' at error location [2022-11-22 00:12:51,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:12:51,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:12:51,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-22 00:12:51,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339203285] [2022-11-22 00:12:51,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:12:51,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-22 00:12:51,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:12:51,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-22 00:12:51,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-11-22 00:12:51,428 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:37,860 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2022-11-22 00:17:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-22 00:17:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 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 195 [2022-11-22 00:17:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:37,869 INFO L225 Difference]: With dead ends: 2300 [2022-11-22 00:17:37,869 INFO L226 Difference]: Without dead ends: 2295 [2022-11-22 00:17:37,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 57.7s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2022-11-22 00:17:37,880 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2364 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:37,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3514 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2364 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 00:17:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-11-22 00:17:37,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2022-11-22 00:17:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2022-11-22 00:17:37,916 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2022-11-22 00:17:37,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:37,917 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2022-11-22 00:17:37,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2022-11-22 00:17:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-11-22 00:17:37,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:37,925 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2022-11-22 00:17:37,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:38,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 00:17:38,135 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:17:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1299815697, now seen corresponding path program 8 times [2022-11-22 00:17:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:38,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928951401] [2022-11-22 00:17:38,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:38,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:19:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:19:04,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:19:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928951401] [2022-11-22 00:19:04,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928951401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:19:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164734295] [2022-11-22 00:19:04,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:19:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:19:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:19:04,669 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:19:04,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4632f2e-93b0-4e0e-b9f7-fd0893acd7a4/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process