./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 888cdd97c166bb1845a1f80726a5a1a78f2657e5f80cffe034fcc1253f98195c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:35:44,218 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:35:44,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:35:44,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:35:44,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:35:44,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:35:44,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:35:44,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:35:44,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:35:44,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:35:44,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:35:44,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:35:44,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:35:44,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:35:44,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:35:44,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:35:44,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:35:44,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:35:44,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:35:44,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:35:44,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:35:44,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:35:44,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:35:44,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:35:44,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:35:44,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:35:44,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:35:44,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:35:44,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:35:44,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:35:44,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:35:44,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:35:44,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:35:44,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:35:44,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:35:44,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:35:44,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:35:44,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:35:44,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:35:44,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:35:44,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:35:44,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:35:44,277 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:35:44,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:35:44,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:35:44,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:35:44,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:35:44,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:35:44,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:35:44,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:35:44,289 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:35:44,289 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:35:44,290 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:35:44,290 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:35:44,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:35:44,290 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:35:44,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:35:44,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:35:44,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:35:44,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:35:44,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:35:44,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:35:44,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:35:44,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:35:44,293 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_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 888cdd97c166bb1845a1f80726a5a1a78f2657e5f80cffe034fcc1253f98195c [2022-12-14 13:35:44,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:35:44,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:35:44,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:35:44,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:35:44,474 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:35:44,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2022-12-14 13:35:47,078 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:35:47,189 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:35:47,189 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i [2022-12-14 13:35:47,193 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/data/9055a486b/753266dc72b8431a8bc98ed4359ed09f/FLAGc03bce3d9 [2022-12-14 13:35:47,203 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/data/9055a486b/753266dc72b8431a8bc98ed4359ed09f [2022-12-14 13:35:47,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:35:47,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:35:47,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:35:47,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:35:47,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:35:47,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22646897 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47, skipping insertion in model container [2022-12-14 13:35:47,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:35:47,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:35:47,331 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i[816,829] [2022-12-14 13:35:47,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:35:47,349 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:35:47,358 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/sv-benchmarks/c/array-examples/standard_copy5_ground-1.i[816,829] [2022-12-14 13:35:47,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:35:47,374 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:35:47,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47 WrapperNode [2022-12-14 13:35:47,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:35:47,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:35:47,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:35:47,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:35:47,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,386 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,399 INFO L138 Inliner]: procedures = 16, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 128 [2022-12-14 13:35:47,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:35:47,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:35:47,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:35:47,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:35:47,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:35:47,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:35:47,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:35:47,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:35:47,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (1/1) ... [2022-12-14 13:35:47,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:35:47,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:47,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:35:47,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:35:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:35:47,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:35:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:35:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:35:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:35:47,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:35:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:35:47,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:35:47,535 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:35:47,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:35:47,689 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:35:47,733 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:35:47,733 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-14 13:35:47,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:47 BoogieIcfgContainer [2022-12-14 13:35:47,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:35:47,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:35:47,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:35:47,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:35:47,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:35:47" (1/3) ... [2022-12-14 13:35:47,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab0da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:47, skipping insertion in model container [2022-12-14 13:35:47,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:47" (2/3) ... [2022-12-14 13:35:47,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ab0da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:47, skipping insertion in model container [2022-12-14 13:35:47,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:47" (3/3) ... [2022-12-14 13:35:47,742 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-1.i [2022-12-14 13:35:47,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:35:47,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:35:47,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:35:47,799 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;@54afa394, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:35:47,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:35:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 13:35:47,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:47,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:47,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:47,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1877118411, now seen corresponding path program 1 times [2022-12-14 13:35:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246246506] [2022-12-14 13:35:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:48,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246246506] [2022-12-14 13:35:48,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246246506] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:35:48,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:35:48,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:35:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174422765] [2022-12-14 13:35:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:35:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:35:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:35:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:35:48,088 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-12-14 13:35:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:48,137 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2022-12-14 13:35:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:35:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2022-12-14 13:35:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:48,145 INFO L225 Difference]: With dead ends: 25 [2022-12-14 13:35:48,145 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 13:35:48,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:35:48,151 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:48,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:35:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 13:35:48,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 13:35:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2022-12-14 13:35:48,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2022-12-14 13:35:48,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2022-12-14 13:35:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:48,178 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2022-12-14 13:35:48,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-12-14 13:35:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2022-12-14 13:35:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:35:48,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:48,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:48,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:35:48,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:48,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -247342098, now seen corresponding path program 1 times [2022-12-14 13:35:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:48,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621328997] [2022-12-14 13:35:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:35:48,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:48,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621328997] [2022-12-14 13:35:48,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621328997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:48,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511792510] [2022-12-14 13:35:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:48,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:48,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:48,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:48,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:35:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:35:48,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:35:48,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:35:48,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511792510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:35:48,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:35:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 13:35:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481081356] [2022-12-14 13:35:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:35:48,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:35:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:35:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:35:48,399 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:48,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:48,435 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2022-12-14 13:35:48,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:35:48,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 13:35:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:48,437 INFO L225 Difference]: With dead ends: 27 [2022-12-14 13:35:48,437 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 13:35:48,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:35:48,438 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:48,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:35:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 13:35:48,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 13:35:48,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:48,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-12-14 13:35:48,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2022-12-14 13:35:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:48,442 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-12-14 13:35:48,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-12-14 13:35:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 13:35:48,443 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:48,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:48,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:35:48,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:48,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:48,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:48,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2065295873, now seen corresponding path program 1 times [2022-12-14 13:35:48,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:48,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829901283] [2022-12-14 13:35:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:48,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:35:48,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:48,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829901283] [2022-12-14 13:35:48,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829901283] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349955749] [2022-12-14 13:35:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:48,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:48,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:48,850 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:48,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:35:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:48,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:35:48,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:35:48,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:35:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349955749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114728718] [2022-12-14 13:35:48,984 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:35:48,984 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:48,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:48,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:48,991 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,326 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:35:49,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:35:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 13:35:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:35:49,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:49,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:49,698 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:35:49,699 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 546 treesize of output 545 [2022-12-14 13:35:49,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:35:50,016 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:50,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:50,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,098 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:50,099 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 94 treesize of output 113 [2022-12-14 13:35:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,189 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:50,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,231 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:50,231 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 104 treesize of output 109 [2022-12-14 13:35:50,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,288 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,326 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:50,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:50,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,386 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:50,387 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 94 treesize of output 113 [2022-12-14 13:35:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,450 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,473 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:50,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:50,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,550 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:50,550 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 94 treesize of output 113 [2022-12-14 13:35:50,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,604 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,647 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,687 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:50,687 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 104 treesize of output 109 [2022-12-14 13:35:50,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:50,728 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:50,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:50,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:51,008 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:51,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:51,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:51,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 13:35:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993642992] [2022-12-14 13:35:51,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:51,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:35:51,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:35:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:35:51,010 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:51,044 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-12-14 13:35:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:35:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 13:35:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:51,045 INFO L225 Difference]: With dead ends: 36 [2022-12-14 13:35:51,045 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 13:35:51,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:35:51,047 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:51,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:35:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 13:35:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 13:35:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:51,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-12-14 13:35:51,051 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2022-12-14 13:35:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:51,051 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-12-14 13:35:51,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-12-14 13:35:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:35:51,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:51,051 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:51,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:35:51,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:51,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1823140392, now seen corresponding path program 2 times [2022-12-14 13:35:51,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796144943] [2022-12-14 13:35:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:51,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:35:51,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796144943] [2022-12-14 13:35:51,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796144943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:51,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426768788] [2022-12-14 13:35:51,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:35:51,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:51,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:51,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:51,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:35:51,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:35:51,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:35:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:35:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:35:51,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:35:51,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426768788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:51,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493678671] [2022-12-14 13:35:51,437 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:35:51,437 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:51,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:51,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:51,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:51,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,630 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:35:51,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:35:51,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 13:35:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:35:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:51,885 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:35:51,885 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 556 treesize of output 544 [2022-12-14 13:35:52,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:35:52,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,026 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:52,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,058 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:52,059 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 104 treesize of output 109 [2022-12-14 13:35:52,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,098 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:52,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,168 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:52,168 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 104 treesize of output 109 [2022-12-14 13:35:52,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,204 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,240 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,277 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:52,277 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 104 treesize of output 109 [2022-12-14 13:35:52,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,309 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,328 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:52,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:52,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,379 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:35:52,380 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 94 treesize of output 123 [2022-12-14 13:35:52,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,440 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,465 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:52,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,531 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:35:52,531 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 94 treesize of output 123 [2022-12-14 13:35:52,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:52,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:52,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:52,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:52,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:52,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:52,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:52,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 13:35:52,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267619885] [2022-12-14 13:35:52,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:52,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:35:52,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:52,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:35:52,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:35:52,937 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:52,998 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2022-12-14 13:35:52,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:35:52,998 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 13:35:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:52,999 INFO L225 Difference]: With dead ends: 49 [2022-12-14 13:35:52,999 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 13:35:52,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:35:53,000 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:53,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:35:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 13:35:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 13:35:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-14 13:35:53,005 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2022-12-14 13:35:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:53,005 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-14 13:35:53,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-14 13:35:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 13:35:53,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:53,006 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:53,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:35:53,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:53,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:53,207 INFO L85 PathProgramCache]: Analyzing trace with hash 782997813, now seen corresponding path program 3 times [2022-12-14 13:35:53,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:53,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601597666] [2022-12-14 13:35:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:53,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:53,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:53,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601597666] [2022-12-14 13:35:53,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601597666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655173679] [2022-12-14 13:35:53,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:35:53,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:53,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:53,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:35:53,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:35:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:35:53,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:35:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655173679] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:53,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1125575255] [2022-12-14 13:35:53,446 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:35:53,446 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:53,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:53,447 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:53,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:53,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,612 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:35:53,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:35:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,830 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:35:53,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:35:53,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:53,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:35:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:54,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,029 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:35:54,030 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 546 treesize of output 545 [2022-12-14 13:35:54,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:35:54,247 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:54,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,303 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:54,303 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 94 treesize of output 113 [2022-12-14 13:35:54,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,353 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,375 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,411 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:54,411 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 104 treesize of output 109 [2022-12-14 13:35:54,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,489 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,523 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:54,524 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 104 treesize of output 109 [2022-12-14 13:35:54,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,552 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,569 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:54,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:54,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,624 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:54,624 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 94 treesize of output 113 [2022-12-14 13:35:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,672 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,691 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:54,691 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 [2022-12-14 13:35:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,750 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:35:54,750 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 94 treesize of output 123 [2022-12-14 13:35:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:54,795 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:54,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:54,808 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:55,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:55,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:55,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:55,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 13:35:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673557706] [2022-12-14 13:35:55,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:55,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 13:35:55,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 13:35:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:35:55,020 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:55,056 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2022-12-14 13:35:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 13:35:55,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 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 34 [2022-12-14 13:35:55,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:55,057 INFO L225 Difference]: With dead ends: 72 [2022-12-14 13:35:55,057 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 13:35:55,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:35:55,058 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:55,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:35:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 13:35:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-14 13:35:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 13:35:55,062 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2022-12-14 13:35:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:55,062 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 13:35:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 13:35:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 13:35:55,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:55,062 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:55,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:35:55,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:55,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:55,265 INFO L85 PathProgramCache]: Analyzing trace with hash -386447723, now seen corresponding path program 4 times [2022-12-14 13:35:55,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:55,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415723440] [2022-12-14 13:35:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:55,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:55,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:55,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415723440] [2022-12-14 13:35:55,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415723440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:55,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141021484] [2022-12-14 13:35:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:35:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:55,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:55,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:35:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:55,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:35:55,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:55,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:55,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141021484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367376312] [2022-12-14 13:35:55,770 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:35:55,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:55,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:55,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:55,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,926 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:35:55,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:35:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,113 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:35:56,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:35:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:35:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,307 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:35:56,307 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 546 treesize of output 545 [2022-12-14 13:35:56,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:35:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,558 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:56,558 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 104 treesize of output 109 [2022-12-14 13:35:56,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,593 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,624 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,655 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:56,655 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 104 treesize of output 109 [2022-12-14 13:35:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,694 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,719 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:56,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:56,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,774 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:35:56,774 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 94 treesize of output 123 [2022-12-14 13:35:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,852 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,873 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:56,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,903 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:56,904 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 104 treesize of output 109 [2022-12-14 13:35:56,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,939 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,957 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:56,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:56,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:56,990 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:56,991 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 104 treesize of output 109 [2022-12-14 13:35:57,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:57,025 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:57,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:57,036 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:57,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1357#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:57,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:57,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:57,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 13:35:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693272018] [2022-12-14 13:35:57,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:57,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:35:57,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:35:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:35:57,417 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:35:57,460 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-12-14 13:35:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 13:35:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 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 40 [2022-12-14 13:35:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:35:57,461 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:35:57,462 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 13:35:57,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 13:35:57,463 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:35:57,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:35:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 13:35:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 13:35:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:57,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-12-14 13:35:57,467 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 40 [2022-12-14 13:35:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:35:57,467 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-12-14 13:35:57,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:35:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-12-14 13:35:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 13:35:57,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:35:57,469 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:35:57,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:35:57,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:35:57,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:35:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:35:57,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1984558763, now seen corresponding path program 5 times [2022-12-14 13:35:57,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:35:57,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605888403] [2022-12-14 13:35:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:35:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:35:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:35:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 13:35:58,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:35:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605888403] [2022-12-14 13:35:58,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605888403] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:35:58,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248810371] [2022-12-14 13:35:58,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:35:58,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:35:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:35:58,162 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:35:58,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:35:58,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:35:58,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:35:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:35:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:35:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-12-14 13:35:58,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:35:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-12-14 13:35:58,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248810371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:35:58,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067268860] [2022-12-14 13:35:58,409 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:35:58,409 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:35:58,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:35:58,409 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:35:58,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:35:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,582 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:35:58,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:35:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,738 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:35:58,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:35:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:35:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:58,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:58,939 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:35:58,940 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 546 treesize of output 545 [2022-12-14 13:35:59,146 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 [2022-12-14 13:35:59,164 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:59,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,210 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:35:59,210 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 94 treesize of output 123 [2022-12-14 13:35:59,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,265 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,288 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:35:59,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:35:59,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,334 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:35:59,334 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 94 treesize of output 113 [2022-12-14 13:35:59,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,366 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,385 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,417 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:59,417 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 104 treesize of output 109 [2022-12-14 13:35:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,453 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,475 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:59,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,513 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:59,513 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 104 treesize of output 109 [2022-12-14 13:35:59,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,547 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,570 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:35:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:35:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,607 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:35:59,608 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 104 treesize of output 109 [2022-12-14 13:35:59,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:35:59,643 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:35:59,643 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 25 treesize of output 25 [2022-12-14 13:35:59,657 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:35:59,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:35:59,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:35:59,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:35:59,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 13:35:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261036234] [2022-12-14 13:35:59,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:35:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 13:35:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:35:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 13:35:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:35:59,958 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:00,082 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2022-12-14 13:36:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 13:36:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 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 52 [2022-12-14 13:36:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:00,083 INFO L225 Difference]: With dead ends: 115 [2022-12-14 13:36:00,083 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 13:36:00,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:36:00,084 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:00,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:36:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 13:36:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-12-14 13:36:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-12-14 13:36:00,093 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 52 [2022-12-14 13:36:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:00,093 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-12-14 13:36:00,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-12-14 13:36:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 13:36:00,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:00,095 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:00,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:00,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:36:00,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:00,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1971455790, now seen corresponding path program 6 times [2022-12-14 13:36:00,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:00,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201255685] [2022-12-14 13:36:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:00,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:00,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201255685] [2022-12-14 13:36:00,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201255685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:00,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109408696] [2022-12-14 13:36:00,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:36:00,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:00,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:00,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:00,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:36:01,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:36:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:01,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 13:36:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:01,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:01,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109408696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:01,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339698640] [2022-12-14 13:36:01,615 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:36:01,615 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:01,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:01,615 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:01,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,781 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:36:01,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:36:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 13:36:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:36:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:01,986 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:36:01,987 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 556 treesize of output 544 [2022-12-14 13:36:02,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:36:02,103 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:02,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:02,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,154 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:36:02,154 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 94 treesize of output 123 [2022-12-14 13:36:02,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,201 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,219 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,258 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:02,259 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 104 treesize of output 109 [2022-12-14 13:36:02,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,327 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:02,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:02,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,383 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:36:02,383 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 94 treesize of output 113 [2022-12-14 13:36:02,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,429 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,448 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:02,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,509 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:36:02,509 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 94 treesize of output 123 [2022-12-14 13:36:02,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,588 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,610 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:02,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:02,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,687 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:36:02,688 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 94 treesize of output 123 [2022-12-14 13:36:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:02,738 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:02,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:02,751 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:36:03,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:36:03,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:36:03,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:36:03,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 13:36:03,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931662793] [2022-12-14 13:36:03,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:03,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 13:36:03,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 13:36:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 13:36:03,457 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:03,524 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2022-12-14 13:36:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 13:36:03,525 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 83 [2022-12-14 13:36:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:03,525 INFO L225 Difference]: With dead ends: 170 [2022-12-14 13:36:03,525 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 13:36:03,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 207 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 13:36:03,527 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:03,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:36:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 13:36:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-12-14 13:36:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2022-12-14 13:36:03,532 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 83 [2022-12-14 13:36:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:03,532 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2022-12-14 13:36:03,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2022-12-14 13:36:03,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 13:36:03,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:03,533 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:03,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:36:03,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:03,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:03,737 INFO L85 PathProgramCache]: Analyzing trace with hash 587000597, now seen corresponding path program 7 times [2022-12-14 13:36:03,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:03,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557005888] [2022-12-14 13:36:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:05,152 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557005888] [2022-12-14 13:36:05,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557005888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:05,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523232892] [2022-12-14 13:36:05,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:36:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:05,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:05,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:36:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 13:36:05,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:05,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:07,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523232892] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684347362] [2022-12-14 13:36:07,531 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:36:07,532 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:07,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:07,532 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:07,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:07,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,696 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:36:07,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:36:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,917 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:36:07,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:36:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:07,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:36:08,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:08,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,125 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:36:08,125 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 546 treesize of output 545 [2022-12-14 13:36:08,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:36:08,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,376 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,415 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:08,415 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 104 treesize of output 109 [2022-12-14 13:36:08,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,462 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,502 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,537 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:08,537 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 104 treesize of output 109 [2022-12-14 13:36:08,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,577 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,618 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:08,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,653 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:08,653 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 104 treesize of output 109 [2022-12-14 13:36:08,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,685 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,708 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:08,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,742 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:08,742 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 104 treesize of output 109 [2022-12-14 13:36:08,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,778 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:08,798 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:08,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:08,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,862 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:36:08,862 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 94 treesize of output 113 [2022-12-14 13:36:08,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:08,903 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:08,904 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 [2022-12-14 13:36:08,915 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:36:10,455 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4193#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:36:10,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:36:10,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:36:10,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 13:36:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947072157] [2022-12-14 13:36:10,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 13:36:10,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 13:36:10,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 13:36:10,459 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:10,562 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2022-12-14 13:36:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 13:36:10,563 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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 108 [2022-12-14 13:36:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:10,563 INFO L225 Difference]: With dead ends: 220 [2022-12-14 13:36:10,563 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 13:36:10,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 235 SyntacticMatches, 33 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 13:36:10,566 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:10,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:36:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 13:36:10,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-12-14 13:36:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2022-12-14 13:36:10,573 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 108 [2022-12-14 13:36:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:10,573 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2022-12-14 13:36:10,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:10,573 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2022-12-14 13:36:10,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 13:36:10,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:10,574 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:10,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:36:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:10,776 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash -76192459, now seen corresponding path program 8 times [2022-12-14 13:36:10,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:10,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149360538] [2022-12-14 13:36:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:10,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-14 13:36:14,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149360538] [2022-12-14 13:36:14,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149360538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:14,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601326089] [2022-12-14 13:36:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:36:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:14,893 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:14,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:36:17,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 13:36:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:17,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:36:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2022-12-14 13:36:18,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2022-12-14 13:36:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601326089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812525602] [2022-12-14 13:36:18,445 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:36:18,445 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:18,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:18,446 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:18,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,582 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:36:18,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:36:18,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,785 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:36:18,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:36:18,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:18,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:36:19,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:19,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:19,012 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:36:19,013 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 556 treesize of output 544 [2022-12-14 13:36:19,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:36:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,148 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:19,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,189 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:19,189 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 104 treesize of output 109 [2022-12-14 13:36:19,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,235 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,275 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,315 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:19,315 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 104 treesize of output 109 [2022-12-14 13:36:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,355 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,386 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:19,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:19,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,434 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:36:19,435 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 94 treesize of output 113 [2022-12-14 13:36:19,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,490 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,511 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:19,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,543 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:19,544 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 104 treesize of output 109 [2022-12-14 13:36:19,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,578 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,599 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:19,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,631 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:19,631 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 104 treesize of output 109 [2022-12-14 13:36:19,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:19,665 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:19,666 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 [2022-12-14 13:36:19,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:36:22,020 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6009#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:36:22,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:36:22,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:36:22,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 13:36:22,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486408750] [2022-12-14 13:36:22,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:22,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 13:36:22,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 13:36:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 13:36:22,024 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:22,294 INFO L93 Difference]: Finished difference Result 281 states and 353 transitions. [2022-12-14 13:36:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 13:36:22,295 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 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 158 [2022-12-14 13:36:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:22,295 INFO L225 Difference]: With dead ends: 281 [2022-12-14 13:36:22,295 INFO L226 Difference]: Without dead ends: 221 [2022-12-14 13:36:22,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 413 SyntacticMatches, 33 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7058 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 13:36:22,298 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:22,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:36:22,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-14 13:36:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-12-14 13:36:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 227 transitions. [2022-12-14 13:36:22,306 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 227 transitions. Word has length 158 [2022-12-14 13:36:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:22,307 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 227 transitions. [2022-12-14 13:36:22,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 227 transitions. [2022-12-14 13:36:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 13:36:22,308 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:22,309 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:22,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:36:22,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:36:22,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:22,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1445373742, now seen corresponding path program 9 times [2022-12-14 13:36:22,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100394569] [2022-12-14 13:36:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:22,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:22,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:36:27,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100394569] [2022-12-14 13:36:27,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100394569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308737968] [2022-12-14 13:36:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:36:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:27,144 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:27,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:36:27,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:36:27,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:36:27,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1806 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 13:36:27,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:36:27,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:36:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:36:34,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308737968] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:36:34,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846416039] [2022-12-14 13:36:34,348 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:36:34,348 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:36:34,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:36:34,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:36:34,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:36:34,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,504 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:36:34,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:36:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2022-12-14 13:36:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:36:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,697 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:36:34,697 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 556 treesize of output 544 [2022-12-14 13:36:34,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:36:34,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,804 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:34,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,831 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:34,831 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 104 treesize of output 109 [2022-12-14 13:36:34,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:34,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,901 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:34,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:34,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:36:34,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,927 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:34,928 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 104 treesize of output 109 [2022-12-14 13:36:34,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:34,964 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:34,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:34,987 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:34,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:35,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,031 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:36:35,032 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 94 treesize of output 113 [2022-12-14 13:36:35,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,075 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:35,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:35,092 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:36:35,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:36:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,138 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:36:35,138 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 94 treesize of output 123 [2022-12-14 13:36:35,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:35,194 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 25 treesize of output 25 [2022-12-14 13:36:35,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,211 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:35,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:36:35,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,241 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:36:35,242 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 104 treesize of output 109 [2022-12-14 13:36:35,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:36:35,270 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:36:35,270 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 [2022-12-14 13:36:35,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:36:39,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8515#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:36:39,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:36:39,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:36:39,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 13:36:39,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122325723] [2022-12-14 13:36:39,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:36:39,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 13:36:39,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:36:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 13:36:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 13:36:39,308 INFO L87 Difference]: Start difference. First operand 221 states and 227 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:36:39,682 INFO L93 Difference]: Finished difference Result 442 states and 554 transitions. [2022-12-14 13:36:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 13:36:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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 219 [2022-12-14 13:36:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:36:39,685 INFO L225 Difference]: With dead ends: 442 [2022-12-14 13:36:39,685 INFO L226 Difference]: Without dead ends: 322 [2022-12-14 13:36:39,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 481 SyntacticMatches, 69 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22596 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 13:36:39,687 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:36:39,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:36:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-12-14 13:36:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2022-12-14 13:36:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0218068535825544) internal successors, (328), 321 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 328 transitions. [2022-12-14 13:36:39,699 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 328 transitions. Word has length 219 [2022-12-14 13:36:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:36:39,699 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 328 transitions. [2022-12-14 13:36:39,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:36:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 328 transitions. [2022-12-14 13:36:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-12-14 13:36:39,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:36:39,702 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:36:39,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:36:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:36:39,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:36:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:36:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1434432811, now seen corresponding path program 10 times [2022-12-14 13:36:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:36:39,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101322817] [2022-12-14 13:36:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:36:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:36:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:36:57,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:36:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101322817] [2022-12-14 13:36:57,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101322817] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:36:57,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016157719] [2022-12-14 13:36:57,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:36:57,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:36:57,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:36:57,211 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:36:57,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:36:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:36:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 13:36:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:36:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:36:57,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:37:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:37:26,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016157719] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:37:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817973673] [2022-12-14 13:37:26,987 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:37:26,987 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:37:26,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:37:26,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:37:26,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:37:27,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,142 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:37:27,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:37:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,313 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:37:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:37:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:37:27,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,506 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:37:27,507 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 546 treesize of output 545 [2022-12-14 13:37:27,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:37:27,730 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:37:27,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:37:27,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,796 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:37:27,796 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 94 treesize of output 113 [2022-12-14 13:37:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,837 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:27,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:37:27,855 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:37:27,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:37:27,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,917 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:37:27,918 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 94 treesize of output 113 [2022-12-14 13:37:27,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:27,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:27,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:37:27,981 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:37:27,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:37:28,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,035 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:37:28,035 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 94 treesize of output 123 [2022-12-14 13:37:28,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,106 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:28,106 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 25 treesize of output 25 [2022-12-14 13:37:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,122 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:28,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:37:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:37:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,153 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:37:28,154 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 104 treesize of output 109 [2022-12-14 13:37:28,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,194 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:28,194 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 25 treesize of output 25 [2022-12-14 13:37:28,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,217 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:28,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:37:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,249 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:37:28,250 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 104 treesize of output 109 [2022-12-14 13:37:28,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:37:28,279 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:37:28,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:37:28,289 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:37:29,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12353#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:37:29,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:37:29,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:37:29,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 13:37:29,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33372593] [2022-12-14 13:37:29,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:37:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 13:37:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:37:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 13:37:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 13:37:29,140 INFO L87 Difference]: Start difference. First operand 322 states and 328 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:37:30,615 INFO L93 Difference]: Finished difference Result 644 states and 857 transitions. [2022-12-14 13:37:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 13:37:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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 320 [2022-12-14 13:37:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:37:30,617 INFO L225 Difference]: With dead ends: 644 [2022-12-14 13:37:30,617 INFO L226 Difference]: Without dead ends: 524 [2022-12-14 13:37:30,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 13:37:30,623 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:37:30,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:37:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-12-14 13:37:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-12-14 13:37:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0133843212237095) internal successors, (530), 523 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 530 transitions. [2022-12-14 13:37:30,636 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 530 transitions. Word has length 320 [2022-12-14 13:37:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:37:30,636 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 530 transitions. [2022-12-14 13:37:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:37:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 530 transitions. [2022-12-14 13:37:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-12-14 13:37:30,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:37:30,642 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:37:30,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 13:37:30,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:37:30,843 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:37:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:37:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1146929781, now seen corresponding path program 11 times [2022-12-14 13:37:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:37:30,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332609568] [2022-12-14 13:37:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:37:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:37:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:38:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2022-12-14 13:38:44,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:38:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332609568] [2022-12-14 13:38:44,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332609568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:38:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732238603] [2022-12-14 13:38:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:38:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:38:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:38:44,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:38:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:42:24,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 13:42:24,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:42:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 13:42:25,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:42:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 22 proven. 253 refuted. 0 times theorem prover too weak. 81993 trivial. 0 not checked. [2022-12-14 13:42:27,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:42:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 81898 trivial. 0 not checked. [2022-12-14 13:42:30,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732238603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:42:30,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416989159] [2022-12-14 13:42:30,232 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:42:30,232 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:42:30,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:42:30,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:42:30,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:42:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,355 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:42:30,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:42:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,522 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:42:30,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:42:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:42:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:30,716 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:42:30,717 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 556 treesize of output 544 [2022-12-14 13:42:30,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:42:30,826 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:42:30,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:42:30,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,868 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:42:30,868 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 94 treesize of output 113 [2022-12-14 13:42:30,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:30,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:42:30,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,923 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:30,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:42:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,952 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:42:30,952 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 104 treesize of output 109 [2022-12-14 13:42:30,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:30,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:30,987 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 [2022-12-14 13:42:31,010 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:42:31,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:42:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,054 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:42:31,054 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 94 treesize of output 113 [2022-12-14 13:42:31,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,110 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:31,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:42:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,129 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:31,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:42:31,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:42:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,165 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:42:31,166 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 104 treesize of output 109 [2022-12-14 13:42:31,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:31,198 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 [2022-12-14 13:42:31,214 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:42:31,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:42:31,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,274 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 13:42:31,274 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 94 treesize of output 123 [2022-12-14 13:42:31,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:42:31,335 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:42:31,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:42:31,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:42:39,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18263#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:42:39,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:42:39,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:42:39,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 30] total 457 [2022-12-14 13:42:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602895805] [2022-12-14 13:42:39,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:42:39,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 457 states [2022-12-14 13:42:39,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:42:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 457 interpolants. [2022-12-14 13:42:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83245, Invalid=129737, Unknown=0, NotChecked=0, Total=212982 [2022-12-14 13:42:39,762 INFO L87 Difference]: Start difference. First operand 524 states and 530 transitions. Second operand has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:42:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:42:42,668 INFO L93 Difference]: Finished difference Result 765 states and 897 transitions. [2022-12-14 13:42:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 453 states. [2022-12-14 13:42:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 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 522 [2022-12-14 13:42:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:42:42,673 INFO L225 Difference]: With dead ends: 765 [2022-12-14 13:42:42,673 INFO L226 Difference]: Without dead ends: 645 [2022-12-14 13:42:42,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1969 GetRequests, 1485 SyntacticMatches, 23 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35035 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=83294, Invalid=130612, Unknown=0, NotChecked=0, Total=213906 [2022-12-14 13:42:42,681 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:42:42,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:42:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-12-14 13:42:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 645. [2022-12-14 13:42:42,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.0108695652173914) internal successors, (651), 644 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:42:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 651 transitions. [2022-12-14 13:42:42,697 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 651 transitions. Word has length 522 [2022-12-14 13:42:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:42:42,698 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 651 transitions. [2022-12-14 13:42:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 457 states, 457 states have (on average 1.0547045951859957) internal successors, (482), 457 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:42:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 651 transitions. [2022-12-14 13:42:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-12-14 13:42:42,701 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:42:42,701 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:42:42,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 13:42:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:42:42,903 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:42:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:42:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1243744686, now seen corresponding path program 12 times [2022-12-14 13:42:42,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:42:42,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585748295] [2022-12-14 13:42:42,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:42:42,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:42:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86811 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2022-12-14 13:44:03,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585748295] [2022-12-14 13:44:03,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585748295] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:44:03,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604882181] [2022-12-14 13:44:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:44:03,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:03,094 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:44:03,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:44:03,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:44:03,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:44:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 5382 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 13:44:03,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:44:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 86811 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2022-12-14 13:44:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 86811 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2022-12-14 13:45:59,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604882181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:59,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300479757] [2022-12-14 13:45:59,209 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 13:45:59,209 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:59,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:45:59,209 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:45:59,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:45:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,349 INFO L321 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2022-12-14 13:45:59,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2022-12-14 13:45:59,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,579 INFO L321 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2022-12-14 13:45:59,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2022-12-14 13:45:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2022-12-14 13:45:59,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,775 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:45:59,775 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 556 treesize of output 544 [2022-12-14 13:45:59,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:45:59,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:45:59,897 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:45:59,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:45:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:45:59,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:45:59,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:45:59,932 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:45:59,932 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 104 treesize of output 109 [2022-12-14 13:45:59,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:45:59,969 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:45:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:45:59,999 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:45:59,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:46:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,053 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:46:00,053 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 94 treesize of output 113 [2022-12-14 13:46:00,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,094 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:46:00,114 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 13:46:00,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 13:46:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,168 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 13:46:00,168 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 94 treesize of output 113 [2022-12-14 13:46:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,225 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:46:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,248 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,249 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 [2022-12-14 13:46:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:46:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,284 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:46:00,284 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 104 treesize of output 109 [2022-12-14 13:46:00,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,326 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:46:00,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,350 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:46:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:46:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,384 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 13:46:00,385 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 104 treesize of output 109 [2022-12-14 13:46:00,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:46:00,419 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 13:46:00,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 13:46:00,461 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:46:37,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25739#(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) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem15#1| |ULTIMATE.start_main_#t~mem14#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem14#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 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (<= 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_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:46:37,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:46:37,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:46:37,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 13:46:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600894323] [2022-12-14 13:46:37,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:46:37,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 13:46:37,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:46:37,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 13:46:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 13:46:37,177 INFO L87 Difference]: Start difference. First operand 645 states and 651 transitions. Second operand has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 810 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:46:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:46:50,527 INFO L93 Difference]: Finished difference Result 1290 states and 1706 transitions. [2022-12-14 13:46:50,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 13:46:50,527 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 810 states have internal predecessors, (825), 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 643 [2022-12-14 13:46:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:46:50,529 INFO L225 Difference]: With dead ends: 1290 [2022-12-14 13:46:50,530 INFO L226 Difference]: Without dead ends: 1050 [2022-12-14 13:46:50,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2332 GetRequests, 1330 SyntacticMatches, 188 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235528 ImplicationChecksByTransitivity, 188.0s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 13:46:50,557 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 13:46:50,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 13:46:50,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-12-14 13:46:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1050. [2022-12-14 13:46:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.0066730219256435) internal successors, (1056), 1049 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:46:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1056 transitions. [2022-12-14 13:46:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1056 transitions. Word has length 643 [2022-12-14 13:46:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:46:50,581 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 1056 transitions. [2022-12-14 13:46:50,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0172626387176325) internal successors, (825), 810 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:46:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1056 transitions. [2022-12-14 13:46:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2022-12-14 13:46:50,588 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:46:50,588 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:46:50,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:46:50,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e201a8be-4fa0-42c2-8885-1ad5898b9833/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:46:50,790 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:46:50,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:46:50,791 INFO L85 PathProgramCache]: Analyzing trace with hash -661371563, now seen corresponding path program 13 times [2022-12-14 13:46:50,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:46:50,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104464617] [2022-12-14 13:46:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:46:50,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:46:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat