./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS --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 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 --- 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-8393723 [2022-11-19 07:31:25,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:31:25,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:31:25,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:31:25,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:31:25,131 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:31:25,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:31:25,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:31:25,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:31:25,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:31:25,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:31:25,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:31:25,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:31:25,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:31:25,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:31:25,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:31:25,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:31:25,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:31:25,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:31:25,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:31:25,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:31:25,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:31:25,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:31:25,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:31:25,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:31:25,201 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:31:25,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:31:25,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:31:25,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:31:25,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:31:25,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:31:25,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:31:25,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:31:25,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:31:25,214 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:31:25,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:31:25,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:31:25,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:31:25,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:31:25,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:31:25,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:31:25,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:31:25,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:31:25,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:31:25,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:31:25,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:31:25,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:31:25,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:31:25,272 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:31:25,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:31:25,273 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:31:25,273 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:31:25,274 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:31:25,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:31:25,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:31:25,275 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:31:25,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:31:25,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:31:25,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:31:25,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:31:25,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:31:25,278 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:31:25,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:31:25,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:31:25,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:31:25,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:31:25,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:31:25,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:31:25,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:31:25,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:31:25,283 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:31:25,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:31:25,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:31:25,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:31:25,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:31:25,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:31:25,285 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:31:25,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:31:25,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:31:25,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:31:25,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:31:25,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:31:25,287 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:31:25,288 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_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46a2982bcd9fbf87ad95f35e8d160ffed7259af3c1cb1d5fe78d4df5a4783123 [2022-11-19 07:31:25,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:31:25,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:31:25,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:31:25,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:31:25,649 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:31:25,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-11-19 07:31:25,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/data/905d9956e/ea786c1cd1ba40d28fd22809cffb11f2/FLAGfed80fc11 [2022-11-19 07:31:26,237 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:31:26,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i [2022-11-19 07:31:26,245 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/data/905d9956e/ea786c1cd1ba40d28fd22809cffb11f2/FLAGfed80fc11 [2022-11-19 07:31:26,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/data/905d9956e/ea786c1cd1ba40d28fd22809cffb11f2 [2022-11-19 07:31:26,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:31:26,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:31:26,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:31:26,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:31:26,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:31:26,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:26,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259f2a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26, skipping insertion in model container [2022-11-19 07:31:26,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:26,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:31:26,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:31:26,869 WARN L234 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_40925201-ec41-45f9-9482-313382dae7fa/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-11-19 07:31:26,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:31:26,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:31:26,939 WARN L234 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_40925201-ec41-45f9-9482-313382dae7fa/sv-benchmarks/c/array-examples/standard_copy4_ground-1.i[816,829] [2022-11-19 07:31:26,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:31:26,985 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:31:26,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26 WrapperNode [2022-11-19 07:31:26,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:31:26,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:31:26,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:31:26,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:31:26,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,051 INFO L138 Inliner]: procedures = 16, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2022-11-19 07:31:27,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:31:27,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:31:27,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:31:27,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:31:27,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,100 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:31:27,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:31:27,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:31:27,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:31:27,110 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (1/1) ... [2022-11-19 07:31:27,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:31:27,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:27,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:31:27,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:31:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:31:27,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:31:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:31:27,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:31:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:31:27,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:31:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:31:27,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:31:27,291 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:31:27,294 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:31:27,516 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:31:27,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:31:27,570 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:31:27,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:31:27 BoogieIcfgContainer [2022-11-19 07:31:27,580 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:31:27,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:31:27,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:31:27,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:31:27,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:31:26" (1/3) ... [2022-11-19 07:31:27,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d47e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:31:27, skipping insertion in model container [2022-11-19 07:31:27,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:31:26" (2/3) ... [2022-11-19 07:31:27,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13d47e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:31:27, skipping insertion in model container [2022-11-19 07:31:27,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:31:27" (3/3) ... [2022-11-19 07:31:27,598 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2022-11-19 07:31:27,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:31:27,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:31:27,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:31:27,686 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;@6fd7adb7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:31:27,687 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:31:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) [2022-11-19 07:31:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:31:27,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:27,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:27,700 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1775972037, now seen corresponding path program 1 times [2022-11-19 07:31:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:27,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61477451] [2022-11-19 07:31:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:28,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:28,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61477451] [2022-11-19 07:31:28,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61477451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:28,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:31:28,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:31:28,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141256579] [2022-11-19 07:31:28,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:28,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:31:28,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:28,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:31:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:31:28,147 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-19 07:31:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:28,218 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-19 07:31:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:31:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) Word has length 9 [2022-11-19 07:31:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:28,237 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:31:28,237 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:31:28,243 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 [2022-11-19 07:31:28,256 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:28,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:31:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:31:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:31:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2022-11-19 07:31:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-19 07:31:28,307 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 9 [2022-11-19 07:31:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:28,308 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-19 07:31:28,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 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) [2022-11-19 07:31:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-19 07:31:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:31:28,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:28,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:31:28,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash -594488320, now seen corresponding path program 1 times [2022-11-19 07:31:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064527648] [2022-11-19 07:31:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:28,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:31:28,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:28,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064527648] [2022-11-19 07:31:28,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064527648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:28,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887947014] [2022-11-19 07:31:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:28,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:28,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:28,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:31:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:31:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:31:28,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:31:28,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887947014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:31:28,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:31:28,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:31:28,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508577884] [2022-11-19 07:31:28,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:31:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:31:28,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:31:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:28,766 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-19 07:31:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:28,818 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-19 07:31:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:31:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) Word has length 10 [2022-11-19 07:31:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:28,824 INFO L225 Difference]: With dead ends: 24 [2022-11-19 07:31:28,824 INFO L226 Difference]: Without dead ends: 16 [2022-11-19 07:31:28,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:31:28,830 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:28,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:31:28,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-19 07:31:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-19 07:31:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-19 07:31:28,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2022-11-19 07:31:28,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:28,837 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-19 07:31:28,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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) [2022-11-19 07:31:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-19 07:31:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:31:28,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:28,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:28,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:29,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:29,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash -890727347, now seen corresponding path program 1 times [2022-11-19 07:31:29,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:29,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092572916] [2022-11-19 07:31:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:29,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:31:29,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:29,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092572916] [2022-11-19 07:31:29,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092572916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989055010] [2022-11-19 07:31:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:29,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:29,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:29,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:31:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:31:29,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:31:29,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:31:29,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989055010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:29,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825604767] [2022-11-19 07:31:29,522 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:29,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:29,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:29,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:29,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:29,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:29,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:29,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:29,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:29,994 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:29,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:30,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:31:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:31:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:30,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:30,676 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:31:30,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:31:31,146 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 [2022-11-19 07:31:31,194 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:31,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:31,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,353 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:31,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:31,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,508 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:31,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:31,550 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:31,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:31,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,661 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:31,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,833 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:31,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:31,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,883 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:31,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:31,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:31,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:31,969 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:31,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:32,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:32,053 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:32,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:32,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:32,116 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:32,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:32,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:32,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:32,187 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:32,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:32,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:32,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:32,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:32,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '255#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:32,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:32,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:32,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 07:31:32,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483406920] [2022-11-19 07:31:32,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:32,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:31:32,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:31:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:31:32,683 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:32,750 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2022-11-19 07:31:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:31:32,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 07:31:32,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:32,753 INFO L225 Difference]: With dead ends: 32 [2022-11-19 07:31:32,754 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 07:31:32,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:31:32,762 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:32,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:31:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 07:31:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-19 07:31:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-19 07:31:32,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 14 [2022-11-19 07:31:32,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:32,774 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-19 07:31:32,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:32,777 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-19 07:31:32,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:31:32,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:32,778 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:32,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:32,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:32,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1011981138, now seen corresponding path program 2 times [2022-11-19 07:31:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090125237] [2022-11-19 07:31:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:32,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:31:33,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090125237] [2022-11-19 07:31:33,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090125237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:33,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063433446] [2022-11-19 07:31:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:31:33,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:33,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:33,196 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:33,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:31:33,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:31:33,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:31:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:31:33,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:31:33,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063433446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615285546] [2022-11-19 07:31:33,352 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:33,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:33,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:33,353 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:33,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:33,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,582 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:31:33,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:31:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,850 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:33,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:33,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:31:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:34,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:34,226 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:31:34,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-11-19 07:31:34,408 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 [2022-11-19 07:31:34,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:34,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:34,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,515 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:34,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,590 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:34,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:34,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,624 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:34,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:34,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,697 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:34,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:34,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,749 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:34,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:34,782 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:34,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:34,880 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:34,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:34,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:35,005 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:35,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:35,044 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:35,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:35,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:35,168 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:31:35,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:31:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:35,290 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:35,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:35,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:35,734 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '451#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:35,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:35,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:35,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:31:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117242882] [2022-11-19 07:31:35,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:31:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:31:35,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:31:35,737 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:35,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:35,816 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2022-11-19 07:31:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:31:35,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-19 07:31:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:35,818 INFO L225 Difference]: With dead ends: 42 [2022-11-19 07:31:35,818 INFO L226 Difference]: Without dead ends: 31 [2022-11-19 07:31:35,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:31:35,819 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:35,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:31:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-19 07:31:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-19 07:31:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-19 07:31:35,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-11-19 07:31:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:35,825 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-19 07:31:35,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-19 07:31:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:31:35,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:35,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:35,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:36,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -334360635, now seen corresponding path program 3 times [2022-11-19 07:31:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694908951] [2022-11-19 07:31:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:36,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694908951] [2022-11-19 07:31:36,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694908951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:36,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964483365] [2022-11-19 07:31:36,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:36,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:36,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:36,243 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:31:36,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:31:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:36,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:36,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964483365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:36,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666679500] [2022-11-19 07:31:36,464 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:36,464 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:36,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:36,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:36,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,731 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:36,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:31:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:36,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:31:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:37,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,097 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:31:37,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:31:37,436 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 [2022-11-19 07:31:37,472 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:37,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:37,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,569 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:31:37,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:31:37,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,634 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:37,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:37,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,676 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:37,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:37,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,726 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:37,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:37,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,781 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:37,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:37,812 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:37,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:37,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,907 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:31:37,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:31:37,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:37,978 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:37,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:38,008 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:38,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:38,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:38,136 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:31:38,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:31:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:38,209 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:38,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:38,239 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:38,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '769#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:38,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:38,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:38,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 07:31:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547940381] [2022-11-19 07:31:38,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:31:38,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:31:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:31:38,616 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-11-19 07:31:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:38,686 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-11-19 07:31:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:31:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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 29 [2022-11-19 07:31:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:38,688 INFO L225 Difference]: With dead ends: 62 [2022-11-19 07:31:38,688 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 07:31:38,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:31:38,689 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:38,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:31:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 07:31:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 07:31:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:31:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-19 07:31:38,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2022-11-19 07:31:38,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:38,696 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-19 07:31:38,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-11-19 07:31:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-19 07:31:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:31:38,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:38,697 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:38,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:38,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1231245851, now seen corresponding path program 4 times [2022-11-19 07:31:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615045320] [2022-11-19 07:31:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:39,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615045320] [2022-11-19 07:31:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615045320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131082375] [2022-11-19 07:31:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:31:39,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:39,340 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:39,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:31:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:31:39,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:39,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:39,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131082375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:39,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108061345] [2022-11-19 07:31:39,803 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:39,803 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:39,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:39,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:39,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:39,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:39,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:39,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,085 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:40,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:31:40,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:31:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,368 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:31:40,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:31:40,654 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 [2022-11-19 07:31:40,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,682 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:40,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:40,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,736 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:40,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,790 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:40,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,821 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:40,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,875 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:40,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:40,935 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:40,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:40,971 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:40,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:41,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,085 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:41,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:41,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:41,232 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:41,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:41,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,343 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:41,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:41,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:41,484 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:41,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:41,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:41,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1187#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:41,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:41,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:41,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 07:31:41,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256049204] [2022-11-19 07:31:41,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:41,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:31:41,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:31:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:31:41,817 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 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) [2022-11-19 07:31:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:41,916 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-11-19 07:31:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:31:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 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 35 [2022-11-19 07:31:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:41,920 INFO L225 Difference]: With dead ends: 74 [2022-11-19 07:31:41,920 INFO L226 Difference]: Without dead ends: 49 [2022-11-19 07:31:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:31:41,922 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:31:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-19 07:31:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-19 07:31:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 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) [2022-11-19 07:31:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-19 07:31:41,932 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-11-19 07:31:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:41,932 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-19 07:31:41,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 24 states have internal predecessors, (37), 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) [2022-11-19 07:31:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-19 07:31:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 07:31:41,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:41,934 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:41,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 07:31:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:42,135 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1594973659, now seen corresponding path program 5 times [2022-11-19 07:31:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:42,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584773026] [2022-11-19 07:31:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:31:43,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584773026] [2022-11-19 07:31:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584773026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163369171] [2022-11-19 07:31:43,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:31:43,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:43,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:43,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:31:43,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:31:43,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:43,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:31:43,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-19 07:31:43,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-19 07:31:43,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163369171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946909796] [2022-11-19 07:31:43,528 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:43,528 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:43,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:43,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:43,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:43,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,720 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:31:43,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:31:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:43,976 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:43,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:44,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:31:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:44,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,252 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:31:44,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:31:44,502 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 [2022-11-19 07:31:44,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,540 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:44,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:44,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:44,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,595 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:44,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:44,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:44,675 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:44,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,786 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:44,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:44,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,868 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:44,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:44,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:44,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:44,963 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:45,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:45,020 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:45,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:45,077 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:45,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:45,171 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:31:45,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:31:45,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:45,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:45,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:45,274 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:45,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1735#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:45,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:45,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-19 07:31:45,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015080757] [2022-11-19 07:31:45,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:31:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:31:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:31:45,924 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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) [2022-11-19 07:31:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:46,152 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2022-11-19 07:31:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:31:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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 47 [2022-11-19 07:31:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:46,154 INFO L225 Difference]: With dead ends: 99 [2022-11-19 07:31:46,155 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 07:31:46,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:31:46,156 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:46,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:31:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 07:31:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-19 07:31:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.082191780821918) internal successors, (79), 73 states have internal predecessors, (79), 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) [2022-11-19 07:31:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-11-19 07:31:46,166 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 47 [2022-11-19 07:31:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:46,167 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-11-19 07:31:46,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 35 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) [2022-11-19 07:31:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-11-19 07:31:46,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 07:31:46,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:46,170 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:46,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:46,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:46,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:46,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1448686976, now seen corresponding path program 6 times [2022-11-19 07:31:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:46,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850330110] [2022-11-19 07:31:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:47,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850330110] [2022-11-19 07:31:47,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850330110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:47,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449721751] [2022-11-19 07:31:47,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:31:47,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:47,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:47,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:47,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:31:47,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:31:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:31:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:48,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449721751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:48,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317842732] [2022-11-19 07:31:48,608 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:48,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:48,609 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:48,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:48,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:48,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,797 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:31:48,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:31:48,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,057 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:49,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:31:49,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,300 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:31:49,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-11-19 07:31:49,435 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 [2022-11-19 07:31:49,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,472 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:49,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,518 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:49,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,571 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:49,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:49,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:49,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:49,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:49,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,653 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:49,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:49,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,715 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:49,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:49,748 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:49,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:49,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,849 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:49,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:49,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:49,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:49,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:49,984 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:49,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:50,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:50,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:50,083 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:50,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:50,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:50,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:50,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:50,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:31:50,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2549#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:31:50,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:31:50,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:31:50,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-19 07:31:50,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009849849] [2022-11-19 07:31:50,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:31:50,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:31:50,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:31:50,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:31:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:31:50,666 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-11-19 07:31:50,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:31:50,848 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2022-11-19 07:31:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 07:31:50,849 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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 72 [2022-11-19 07:31:50,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:31:50,850 INFO L225 Difference]: With dead ends: 148 [2022-11-19 07:31:50,850 INFO L226 Difference]: Without dead ends: 99 [2022-11-19 07:31:50,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:31:50,852 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:31:50,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:31:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-19 07:31:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-19 07:31:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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) [2022-11-19 07:31:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-11-19 07:31:50,869 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 72 [2022-11-19 07:31:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:31:50,870 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-11-19 07:31:50,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 50 states have internal predecessors, (63), 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) [2022-11-19 07:31:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-11-19 07:31:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 07:31:50,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:31:50,872 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:31:50,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:31:51,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:51,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:31:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:31:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash 697040229, now seen corresponding path program 7 times [2022-11-19 07:31:51,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:31:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347390124] [2022-11-19 07:31:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:31:51,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:31:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:54,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:54,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347390124] [2022-11-19 07:31:54,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347390124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205390131] [2022-11-19 07:31:54,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:31:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:54,165 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:54,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:31:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:54,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-19 07:31:54,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:54,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:31:57,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205390131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:57,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189014558] [2022-11-19 07:31:58,001 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:31:58,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:58,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:58,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:58,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:58,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,237 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:31:58,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:31:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:31:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:31:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,517 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:31:58,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:31:58,743 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 [2022-11-19 07:31:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,769 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:58,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:58,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,810 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:58,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:58,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:58,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:58,875 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:58,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:58,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:58,965 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:58,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,041 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:59,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:59,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:59,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:59,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,134 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:31:59,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:31:59,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,185 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:59,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:59,222 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:31:59,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:31:59,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,310 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:31:59,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:31:59,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:59,380 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:31:59,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:31:59,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:00,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3711#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:00,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:00,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:00,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-19 07:32:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321541582] [2022-11-19 07:32:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-19 07:32:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:00,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-19 07:32:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:32:00,561 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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) [2022-11-19 07:32:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:00,769 INFO L93 Difference]: Finished difference Result 198 states and 257 transitions. [2022-11-19 07:32:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-19 07:32:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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 97 [2022-11-19 07:32:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:00,774 INFO L225 Difference]: With dead ends: 198 [2022-11-19 07:32:00,775 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:32:00,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 224 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-19 07:32:00,780 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:00,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:32:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:32:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-11-19 07:32:00,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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) [2022-11-19 07:32:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-11-19 07:32:00,810 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 97 [2022-11-19 07:32:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:00,814 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-11-19 07:32:00,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.118811881188119) internal successors, (113), 100 states have internal predecessors, (113), 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) [2022-11-19 07:32:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-11-19 07:32:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 07:32:00,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:00,823 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:00,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:01,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash -69003835, now seen corresponding path program 8 times [2022-11-19 07:32:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666666326] [2022-11-19 07:32:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:01,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-19 07:32:08,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666666326] [2022-11-19 07:32:08,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666666326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:08,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470869250] [2022-11-19 07:32:08,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:32:08,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:08,877 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:08,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:32:12,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:32:12,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:32:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-11-19 07:32:12,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5071 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2022-11-19 07:32:13,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470869250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:13,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [298370867] [2022-11-19 07:32:13,635 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:32:13,635 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:13,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:13,636 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:13,636 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:32:13,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,798 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:32:13,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:32:13,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:14,033 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:32:14,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:32:14,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:14,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:32:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:14,248 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:32:14,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-11-19 07:32:14,369 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 [2022-11-19 07:32:14,400 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:32:14,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:32:14,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,492 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:32:14,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:32:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,551 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:14,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:14,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:14,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:14,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:14,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,629 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:32:14,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:32:14,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:14,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:14,690 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:32:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:32:14,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,758 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:32:14,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:32:14,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,829 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:14,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:14,880 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:32:14,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:32:14,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:14,961 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:32:14,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:32:15,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:15,055 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:15,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:15,071 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:15,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:15,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:15,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:15,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-19 07:32:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984162705] [2022-11-19 07:32:15,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-19 07:32:15,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:15,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-19 07:32:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:32:15,920 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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) [2022-11-19 07:32:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:16,421 INFO L93 Difference]: Finished difference Result 247 states and 305 transitions. [2022-11-19 07:32:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-19 07:32:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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 147 [2022-11-19 07:32:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:16,423 INFO L225 Difference]: With dead ends: 247 [2022-11-19 07:32:16,423 INFO L226 Difference]: Without dead ends: 198 [2022-11-19 07:32:16,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-19 07:32:16,428 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:16,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:32:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-19 07:32:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-19 07:32:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0304568527918783) internal successors, (203), 197 states have internal predecessors, (203), 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) [2022-11-19 07:32:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2022-11-19 07:32:16,443 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 147 [2022-11-19 07:32:16,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:16,444 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2022-11-19 07:32:16,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 123 states have internal predecessors, (139), 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) [2022-11-19 07:32:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2022-11-19 07:32:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-19 07:32:16,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:16,447 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:16,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:16,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:16,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:16,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 493677056, now seen corresponding path program 9 times [2022-11-19 07:32:16,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:16,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166228844] [2022-11-19 07:32:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:16,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:32:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:32:25,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:32:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166228844] [2022-11-19 07:32:25,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166228844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:32:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761097331] [2022-11-19 07:32:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:32:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:32:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:32:25,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:32:25,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:32:25,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:32:25,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:32:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 07:32:25,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:32:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:32:25,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:32:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5962 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:32:38,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761097331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:32:38,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [479185619] [2022-11-19 07:32:38,120 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:32:38,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:32:38,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:32:38,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:32:38,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:32:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,338 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:32:38,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:32:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:32:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 07:32:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,542 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 07:32:38,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 468 treesize of output 456 [2022-11-19 07:32:38,673 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 [2022-11-19 07:32:38,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:38,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:38,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,753 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:32:38,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:32:38,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,799 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:38,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:38,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,828 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:38,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:38,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,880 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:32:38,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:32:38,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,930 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:38,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:38,959 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:32:38,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:32:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,038 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:32:39,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:32:39,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,111 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:39,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:39,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:39,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:39,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:32:39,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,192 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:32:39,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:32:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:32:39,249 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:32:39,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:32:39,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:42,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7649#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:42,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:42,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:42,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-19 07:32:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894676584] [2022-11-19 07:32:42,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-19 07:32:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:42,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-19 07:32:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 07:32:42,894 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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) [2022-11-19 07:32:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:32:43,461 INFO L93 Difference]: Finished difference Result 396 states and 506 transitions. [2022-11-19 07:32:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-19 07:32:43,462 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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 196 [2022-11-19 07:32:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:32:43,464 INFO L225 Difference]: With dead ends: 396 [2022-11-19 07:32:43,465 INFO L226 Difference]: Without dead ends: 299 [2022-11-19 07:32:43,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 458 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-19 07:32:43,469 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:32:43,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:32:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-19 07:32:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-19 07:32:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0201342281879195) internal successors, (304), 298 states have internal predecessors, (304), 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) [2022-11-19 07:32:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 304 transitions. [2022-11-19 07:32:43,499 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 304 transitions. Word has length 196 [2022-11-19 07:32:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:32:43,500 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 304 transitions. [2022-11-19 07:32:43,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0591133004926108) internal successors, (215), 202 states have internal predecessors, (215), 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) [2022-11-19 07:32:43,501 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 304 transitions. [2022-11-19 07:32:43,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-11-19 07:32:43,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:32:43,512 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:32:43,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:32:43,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:32:43,723 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:32:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:32:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash 915975333, now seen corresponding path program 10 times [2022-11-19 07:32:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:32:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574148714] [2022-11-19 07:32:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:32:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:32:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:33:10,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:33:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574148714] [2022-11-19 07:33:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574148714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:33:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558351643] [2022-11-19 07:33:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:33:10,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:33:10,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:33:10,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:33:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:33:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 2538 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-19 07:33:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:33:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:33:11,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21112 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:34:03,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558351643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:03,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770119019] [2022-11-19 07:34:03,060 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:34:03,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:03,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:03,061 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:03,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,253 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:34:03,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:34:03,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,537 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:34:03,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:34:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:34:03,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:03,719 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:34:03,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:34:03,959 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 [2022-11-19 07:34:03,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:03,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:03,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:04,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,035 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:34:04,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:34:04,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:04,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,106 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:34:04,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:34:04,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,194 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:34:04,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:34:04,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:04,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:04,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,343 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:34:04,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:34:04,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,392 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:04,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,436 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:34:04,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:34:04,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,520 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:34:04,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:34:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:04,590 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:04,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:34:04,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:11,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11211#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:11,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:11,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:34:11,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-19 07:34:11,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912494783] [2022-11-19 07:34:11,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-19 07:34:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:11,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-19 07:34:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 07:34:11,515 INFO L87 Difference]: Start difference. First operand 299 states and 304 transitions. Second operand has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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) [2022-11-19 07:34:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:14,125 INFO L93 Difference]: Finished difference Result 598 states and 809 transitions. [2022-11-19 07:34:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-19 07:34:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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 297 [2022-11-19 07:34:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:14,130 INFO L225 Difference]: With dead ends: 598 [2022-11-19 07:34:14,130 INFO L226 Difference]: Without dead ends: 501 [2022-11-19 07:34:14,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 660 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 74.0s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-19 07:34:14,143 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:14,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:34:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-19 07:34:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 501. [2022-11-19 07:34:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.012) internal successors, (506), 500 states have internal predecessors, (506), 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) [2022-11-19 07:34:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 506 transitions. [2022-11-19 07:34:14,166 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 506 transitions. Word has length 297 [2022-11-19 07:34:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:14,166 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 506 transitions. [2022-11-19 07:34:14,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0296296296296297) internal successors, (417), 404 states have internal predecessors, (417), 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) [2022-11-19 07:34:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 506 transitions. [2022-11-19 07:34:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-11-19 07:34:14,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:14,179 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:14,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:14,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:14,390 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:14,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:14,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1859959419, now seen corresponding path program 11 times [2022-11-19 07:34:14,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:14,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168551350] [2022-11-19 07:34:14,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:14,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-11-19 07:36:07,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:07,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168551350] [2022-11-19 07:36:07,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168551350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:07,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157993972] [2022-11-19 07:36:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:36:07,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:07,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:07,763 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:07,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:38:20,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 07:38:20,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:38:20,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-19 07:38:20,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:38:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 468 proven. 253 refuted. 0 times theorem prover too weak. 81294 trivial. 0 not checked. [2022-11-19 07:38:25,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:38:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 82015 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81762 trivial. 0 not checked. [2022-11-19 07:38:30,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157993972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:38:30,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521483521] [2022-11-19 07:38:30,392 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:38:30,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:38:30,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:38:30,392 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:38:30,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:38:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,619 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:38:30,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:38:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 26 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 42 [2022-11-19 07:38:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:38:30,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:30,863 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:38:30,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:38:31,105 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 [2022-11-19 07:38:31,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,129 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:38:31,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:38:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:38:31,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,181 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:38:31,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:38:31,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,222 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:38:31,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:38:31,253 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:38:31,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:38:31,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,340 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:38:31,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:38:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,411 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:38:31,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:38:31,435 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:38:31,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:38:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,511 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:38:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:38:31,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,613 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:38:31,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:38:31,642 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:38:31,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:38:31,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,720 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:38:31,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 117 [2022-11-19 07:38:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:38:31,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:38:31,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:38:31,823 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:38:33,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16841#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:38:33,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:38:33,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:38:33,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 27, 25] total 453 [2022-11-19 07:38:33,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630203347] [2022-11-19 07:38:33,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:38:33,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2022-11-19 07:38:33,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:33,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2022-11-19 07:38:33,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83401, Invalid=125905, Unknown=0, NotChecked=0, Total=209306 [2022-11-19 07:38:33,896 INFO L87 Difference]: Start difference. First operand 501 states and 506 transitions. Second operand has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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) [2022-11-19 07:38:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:48,478 INFO L93 Difference]: Finished difference Result 695 states and 801 transitions. [2022-11-19 07:38:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-11-19 07:38:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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 499 [2022-11-19 07:38:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:48,482 INFO L225 Difference]: With dead ends: 695 [2022-11-19 07:38:48,483 INFO L226 Difference]: Without dead ends: 598 [2022-11-19 07:38:48,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1994 GetRequests, 1490 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23053 ImplicationChecksByTransitivity, 90.5s TimeCoverageRelationStatistics Valid=85802, Invalid=169728, Unknown=0, NotChecked=0, Total=255530 [2022-11-19 07:38:48,496 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 234 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:48,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 56 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:38:48,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-19 07:38:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 598. [2022-11-19 07:38:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.0100502512562815) internal successors, (603), 597 states have internal predecessors, (603), 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) [2022-11-19 07:38:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 603 transitions. [2022-11-19 07:38:48,529 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 603 transitions. Word has length 499 [2022-11-19 07:38:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:48,530 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 603 transitions. [2022-11-19 07:38:48,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 453 states, 453 states have (on average 1.055187637969095) internal successors, (478), 453 states have internal predecessors, (478), 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) [2022-11-19 07:38:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 603 transitions. [2022-11-19 07:38:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2022-11-19 07:38:48,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:48,547 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:48,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:48,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:38:48,763 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1616233088, now seen corresponding path program 12 times [2022-11-19 07:38:48,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:48,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175490078] [2022-11-19 07:38:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:48,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:38:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:40:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-19 07:40:48,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:40:48,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175490078] [2022-11-19 07:40:48,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175490078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:40:48,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428351335] [2022-11-19 07:40:48,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:40:48,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:40:48,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:40:48,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:40:48,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40925201-ec41-45f9-9482-313382dae7fa/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:40:49,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:40:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:40:49,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 5037 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-19 07:40:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:40:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-19 07:40:50,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:44:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 85730 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2022-11-19 07:44:12,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428351335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:44:12,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265652259] [2022-11-19 07:44:12,306 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:44:12,306 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:44:12,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:44:12,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:44:12,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:44:12,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,455 INFO L321 Elim1Store]: treesize reduction 244, result has 14.7 percent of original size [2022-11-19 07:44:12,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 11 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 58 [2022-11-19 07:44:12,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,690 INFO L321 Elim1Store]: treesize reduction 360, result has 11.3 percent of original size [2022-11-19 07:44:12,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 99 treesize of output 125 [2022-11-19 07:44:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 07:44:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:12,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:12,868 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 07:44:12,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 458 treesize of output 457 [2022-11-19 07:44:13,056 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 [2022-11-19 07:44:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,079 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:44:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,132 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:44:13,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:44:13,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,172 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,245 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-19 07:44:13,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 103 [2022-11-19 07:44:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,286 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,315 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:44:13,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:44:13,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,381 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:44:13,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:44:13,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,478 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:44:13,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:44:13,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,543 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:44:13,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 107 [2022-11-19 07:44:13,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:44:13,596 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:44:13,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:44:13,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:44:15,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23942#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem13#1| |ULTIMATE.start_main_#t~mem12#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem12#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a5~0#1.base|) (+ |ULTIMATE.start_main_~#a5~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem13#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:44:15,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:44:15,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:44:15,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-19 07:44:15,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020008203] [2022-11-19 07:44:15,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:44:15,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-19 07:44:15,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:44:15,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-19 07:44:15,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-19 07:44:15,856 INFO L87 Difference]: Start difference. First operand 598 states and 603 transitions. Second operand has 811 states, 811 states have (on average 1.0147965474722564) internal successors, (823), 810 states have internal predecessors, (823), 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)