./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta --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 46307615818d6371ae296fa4995def50a9373bd159748713204d6c22dd4af97e --- 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-dbf71c6-m [2022-10-17 17:17:35,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:17:35,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:17:35,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:17:35,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:17:35,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:17:35,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:17:35,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:17:35,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:17:35,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:17:35,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:17:35,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:17:35,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:17:35,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:17:35,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:17:35,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:17:35,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:17:35,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:17:35,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:17:35,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:17:35,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:17:35,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:17:35,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:17:35,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:17:35,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:17:35,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:17:35,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:17:35,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:17:35,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:17:35,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:17:35,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:17:35,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:17:35,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:17:35,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:17:35,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:17:35,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:17:35,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:17:35,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:17:35,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:17:35,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:17:35,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:17:35,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:17:35,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:17:35,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:17:35,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:17:35,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:17:35,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:17:35,343 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:17:35,343 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:17:35,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:17:35,344 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:17:35,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:17:35,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:17:35,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:17:35,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:17:35,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:17:35,346 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:17:35,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:17:35,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:17:35,346 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:17:35,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:17:35,347 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:17:35,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:17:35,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:17:35,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:17:35,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:17:35,348 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:17:35,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:17:35,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:17:35,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:17:35,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:17:35,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:17:35,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:17:35,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:17:35,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:35,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:17:35,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:17:35,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:17:35,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:17:35,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:17:35,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:17:35,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:17:35,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:17:35,352 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_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46307615818d6371ae296fa4995def50a9373bd159748713204d6c22dd4af97e [2022-10-17 17:17:35,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:17:35,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:17:35,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:17:35,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:17:35,737 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:17:35,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-10-17 17:17:35,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/data/21472f7ce/a3640449bd9a46de86bfc855078345c2/FLAG579667972 [2022-10-17 17:17:36,289 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:17:36,290 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2022-10-17 17:17:36,313 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/data/21472f7ce/a3640449bd9a46de86bfc855078345c2/FLAG579667972 [2022-10-17 17:17:36,625 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/data/21472f7ce/a3640449bd9a46de86bfc855078345c2 [2022-10-17 17:17:36,628 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:17:36,629 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:17:36,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:36,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:17:36,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:17:36,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3c6e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36, skipping insertion in model container [2022-10-17 17:17:36,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:17:36,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:17:36,846 WARN L230 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_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2022-10-17 17:17:36,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:36,877 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:17:36,890 WARN L230 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_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] [2022-10-17 17:17:36,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:17:36,916 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:17:36,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36 WrapperNode [2022-10-17 17:17:36,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:17:36,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:36,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:17:36,918 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:17:36,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,958 INFO L138 Inliner]: procedures = 16, calls = 49, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 163 [2022-10-17 17:17:36,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:17:36,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:17:36,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:17:36,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:17:36,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:36,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:37,001 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:37,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:37,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:17:37,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:17:37,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:17:37,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:17:37,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (1/1) ... [2022-10-17 17:17:37,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:17:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:37,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:17:37,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:17:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:17:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:17:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:17:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:17:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:17:37,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:17:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:17:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:17:37,161 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:17:37,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:17:37,382 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:17:37,439 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:17:37,440 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-17 17:17:37,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:37 BoogieIcfgContainer [2022-10-17 17:17:37,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:17:37,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:17:37,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:17:37,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:17:37,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:17:36" (1/3) ... [2022-10-17 17:17:37,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404ae2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:37, skipping insertion in model container [2022-10-17 17:17:37,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:17:36" (2/3) ... [2022-10-17 17:17:37,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7404ae2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:17:37, skipping insertion in model container [2022-10-17 17:17:37,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:17:37" (3/3) ... [2022-10-17 17:17:37,454 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2022-10-17 17:17:37,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:17:37,472 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:17:37,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:17:37,544 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;@1e1acdec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:17:37,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:17:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) [2022-10-17 17:17:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:17:37,579 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:37,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:37,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:37,586 INFO L85 PathProgramCache]: Analyzing trace with hash -175839371, now seen corresponding path program 1 times [2022-10-17 17:17:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:37,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868012631] [2022-10-17 17:17:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:37,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:38,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:38,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868012631] [2022-10-17 17:17:38,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868012631] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:38,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:17:38,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:17:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039859819] [2022-10-17 17:17:38,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:38,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:17:38,142 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:38,219 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-10-17 17:17:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:17:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:38,230 INFO L225 Difference]: With dead ends: 29 [2022-10-17 17:17:38,230 INFO L226 Difference]: Without dead ends: 15 [2022-10-17 17:17:38,233 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 [2022-10-17 17:17:38,237 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:38,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:38,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-10-17 17:17:38,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-10-17 17:17:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 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) [2022-10-17 17:17:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2022-10-17 17:17:38,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 12 [2022-10-17 17:17:38,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:38,273 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2022-10-17 17:17:38,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:38,273 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2022-10-17 17:17:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:17:38,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:38,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:38,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:17:38,275 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2071697903, now seen corresponding path program 1 times [2022-10-17 17:17:38,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911423093] [2022-10-17 17:17:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:17:38,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:38,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911423093] [2022-10-17 17:17:38,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911423093] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098118274] [2022-10-17 17:17:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:38,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:38,418 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:38,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:17:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:17:38,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:17:38,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:17:38,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098118274] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:17:38,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:17:38,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-10-17 17:17:38,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659942718] [2022-10-17 17:17:38,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:17:38,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:17:38,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:17:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:38,590 INFO L87 Difference]: Start difference. First operand 15 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-10-17 17:17:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:38,693 INFO L93 Difference]: Finished difference Result 33 states and 54 transitions. [2022-10-17 17:17:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:17:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 13 [2022-10-17 17:17:38,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:38,695 INFO L225 Difference]: With dead ends: 33 [2022-10-17 17:17:38,695 INFO L226 Difference]: Without dead ends: 22 [2022-10-17 17:17:38,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:17:38,698 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:38,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-10-17 17:17:38,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-10-17 17:17:38,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-10-17 17:17:38,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-10-17 17:17:38,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:38,710 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-10-17 17:17:38,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-10-17 17:17:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-10-17 17:17:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:17:38,716 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:38,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:38,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:38,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:38,944 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash -598627713, now seen corresponding path program 1 times [2022-10-17 17:17:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:38,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396829599] [2022-10-17 17:17:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:17:39,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396829599] [2022-10-17 17:17:39,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396829599] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:39,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007807020] [2022-10-17 17:17:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:39,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:39,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:39,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:17:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:39,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:17:39,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:17:39,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 17:17:39,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007807020] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:17:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638590799] [2022-10-17 17:17:39,546 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:17:39,546 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:17:39,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:17:39,569 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:17:39,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:17:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,478 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-10-17 17:17:40,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-10-17 17:17:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-10-17 17:17:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:40,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 20 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-10-17 17:17:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:41,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:41,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:41,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:41,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:41,682 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-10-17 17:17:41,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 788 treesize of output 778 [2022-10-17 17:17:43,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:43,798 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-10-17 17:17:43,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-10-17 17:17:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:43,855 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:43,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:43,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:43,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:43,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:43,940 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:43,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:44,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,016 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,059 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:44,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,130 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:44,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:44,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,208 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,250 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:44,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,332 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:44,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:44,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,397 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,437 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:44,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,537 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:44,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:44,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,682 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:44,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,720 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:44,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:44,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:44,865 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:17:44,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:17:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,009 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:45,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:45,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,048 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:45,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,117 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:45,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:45,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,231 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:45,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:45,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,294 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:45,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:45,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,363 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:45,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:45,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:45,418 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:45,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:45,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:17:45,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(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|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem20#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 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_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem19#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)))) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |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_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem20#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:17:45,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:17:45,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:17:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:17:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849051464] [2022-10-17 17:17:45,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:17:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:17:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:17:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:45,792 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:45,867 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-10-17 17:17:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:17:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-10-17 17:17:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:45,868 INFO L225 Difference]: With dead ends: 44 [2022-10-17 17:17:45,869 INFO L226 Difference]: Without dead ends: 25 [2022-10-17 17:17:45,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:45,870 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:45,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:45,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-10-17 17:17:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-10-17 17:17:45,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-10-17 17:17:45,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 20 [2022-10-17 17:17:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:45,876 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-10-17 17:17:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-10-17 17:17:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-17 17:17:45,878 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:45,878 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:45,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:46,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:46,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:46,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1740497991, now seen corresponding path program 2 times [2022-10-17 17:17:46,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:46,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182032901] [2022-10-17 17:17:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:46,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:17:46,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:46,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182032901] [2022-10-17 17:17:46,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182032901] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:46,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943252287] [2022-10-17 17:17:46,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:17:46,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:46,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:46,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:46,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:17:46,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:17:46,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:17:46,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:17:46,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:17:46,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-10-17 17:17:46,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943252287] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:17:46,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334112600] [2022-10-17 17:17:46,468 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:17:46,475 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:17:46,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:17:46,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:17:46,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:17:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:46,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,201 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-10-17 17:17:47,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-10-17 17:17:47,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-10-17 17:17:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 20 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-10-17 17:17:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:47,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:47,909 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-10-17 17:17:47,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 808 treesize of output 776 [2022-10-17 17:17:48,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,214 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-10-17 17:17:48,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-10-17 17:17:48,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,255 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:48,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:48,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,318 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:48,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,374 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:48,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,403 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:48,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,499 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:48,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:48,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,604 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:48,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,638 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:48,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,761 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:48,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:48,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,833 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:48,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,865 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:48,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:48,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:48,952 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:48,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:49,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,072 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,102 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:49,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,174 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:49,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:49,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,230 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,266 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:49,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,356 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:49,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,418 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,480 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:49,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,590 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:17:49,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:17:49,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:49,711 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:49,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:49,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:17:50,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(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|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem20#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 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_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem19#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)))) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |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_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem20#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:17:50,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:17:50,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:17:50,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-17 17:17:50,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248576646] [2022-10-17 17:17:50,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:17:50,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:17:50,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:50,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:17:50,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:50,074 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:50,193 INFO L93 Difference]: Finished difference Result 63 states and 98 transitions. [2022-10-17 17:17:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:17:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-10-17 17:17:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:50,195 INFO L225 Difference]: With dead ends: 63 [2022-10-17 17:17:50,195 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 17:17:50,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:17:50,196 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:50,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 17:17:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-17 17:17:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-10-17 17:17:50,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 23 [2022-10-17 17:17:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:50,205 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-10-17 17:17:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:17:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-10-17 17:17:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:17:50,206 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:50,207 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:50,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:50,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:50,426 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash 782714613, now seen corresponding path program 3 times [2022-10-17 17:17:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:50,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302654291] [2022-10-17 17:17:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:50,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302654291] [2022-10-17 17:17:50,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302654291] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:50,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842460415] [2022-10-17 17:17:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:17:50,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:50,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:50,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:50,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:17:50,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:17:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:17:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:17:50,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:50,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:50,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842460415] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:17:50,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2097041748] [2022-10-17 17:17:50,978 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:17:50,979 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:17:50,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:17:50,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:17:50,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:17:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,407 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-10-17 17:17:51,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-10-17 17:17:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:51,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:52,076 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-10-17 17:17:52,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-10-17 17:17:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:52,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:52,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 20 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-10-17 17:17:52,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:52,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:52,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:52,622 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-10-17 17:17:52,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 788 treesize of output 778 [2022-10-17 17:17:53,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,653 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-10-17 17:17:53,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-10-17 17:17:53,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,692 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:53,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:53,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:53,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,746 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:53,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:53,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,798 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:53,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:53,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,829 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:53,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,893 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:53,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,946 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:53,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:53,994 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:53,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,057 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:54,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:54,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,108 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:54,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,141 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:54,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,246 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:17:54,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:17:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,353 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:54,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,376 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:54,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,494 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:54,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:54,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,553 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:54,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,583 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:54,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,671 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:54,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:54,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,760 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:54,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,798 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:54,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:54,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,884 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:17:54,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:17:54,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:54,997 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:54,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:55,020 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:17:55,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1099#(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|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem20#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 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_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem19#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)))) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |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_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem20#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:17:55,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:17:55,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:17:55,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-10-17 17:17:55,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458651700] [2022-10-17 17:17:55,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:17:55,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 17:17:55,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:17:55,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 17:17:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:17:55,329 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-10-17 17:17:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:17:55,427 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2022-10-17 17:17:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:17:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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 44 [2022-10-17 17:17:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:17:55,429 INFO L225 Difference]: With dead ends: 92 [2022-10-17 17:17:55,429 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 17:17:55,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-10-17 17:17:55,430 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:17:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:17:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 17:17:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-10-17 17:17:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 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) [2022-10-17 17:17:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-10-17 17:17:55,439 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 44 [2022-10-17 17:17:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:17:55,439 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-10-17 17:17:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-10-17 17:17:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-10-17 17:17:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 17:17:55,441 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:17:55,442 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:17:55,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:17:55,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:55,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:17:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:17:55,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2127379275, now seen corresponding path program 4 times [2022-10-17 17:17:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:17:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371261441] [2022-10-17 17:17:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:17:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:17:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:56,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:17:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371261441] [2022-10-17 17:17:56,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371261441] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:17:56,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952124970] [2022-10-17 17:17:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:17:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:17:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:17:56,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:17:56,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:17:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:17:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:17:56,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:17:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:56,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:17:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:17:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952124970] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:17:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038873112] [2022-10-17 17:17:56,634 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:17:56,634 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:17:56,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:17:56,635 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:17:56,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:17:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,181 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-10-17 17:17:57,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-10-17 17:17:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 53 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 57 [2022-10-17 17:17:57,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 20 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-10-17 17:17:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:57,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:57,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:57,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:57,841 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-10-17 17:17:57,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 788 treesize of output 778 [2022-10-17 17:17:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,039 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-10-17 17:17:59,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-10-17 17:17:59,072 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:59,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,155 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:17:59,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:17:59,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,255 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,291 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,361 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:59,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:59,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,421 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,457 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:17:59,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,532 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:17:59,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:17:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,583 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,618 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:59,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,741 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:59,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:17:59,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,846 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:17:59,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,876 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:17:59,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:17:59,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:17:59,984 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:17:59,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:18:00,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,071 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:00,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:00,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,107 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:00,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,184 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-10-17 17:18:00,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 116 treesize of output 121 [2022-10-17 17:18:00,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,262 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:00,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:00,321 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:18:00,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:00,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,441 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:18:00,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:18:00,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:00,510 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:00,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:00,526 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:18:00,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1697#(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|) (= (ite (= |ULTIMATE.start_main_#t~mem19#1| |ULTIMATE.start_main_#t~mem20#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 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_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem19#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)))) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |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_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a8~0#1.base|) (+ |ULTIMATE.start_main_~#a8~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem20#1|) (= |#NULL.base| 0))' at error location [2022-10-17 17:18:00,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:18:00,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:18:00,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-10-17 17:18:00,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251667919] [2022-10-17 17:18:00,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:18:00,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 17:18:00,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:18:00,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 17:18:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-10-17 17:18:00,980 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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) [2022-10-17 17:18:01,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:18:01,126 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-10-17 17:18:01,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 17:18:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 50 [2022-10-17 17:18:01,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:18:01,127 INFO L225 Difference]: With dead ends: 104 [2022-10-17 17:18:01,128 INFO L226 Difference]: Without dead ends: 64 [2022-10-17 17:18:01,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-10-17 17:18:01,130 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:18:01,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:18:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-17 17:18:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-10-17 17:18:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 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) [2022-10-17 17:18:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-10-17 17:18:01,141 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 50 [2022-10-17 17:18:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:18:01,141 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-10-17 17:18:01,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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) [2022-10-17 17:18:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-10-17 17:18:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-10-17 17:18:01,145 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:18:01,145 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:18:01,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:18:01,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:18:01,348 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:18:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:18:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1301663797, now seen corresponding path program 5 times [2022-10-17 17:18:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:18:01,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860038729] [2022-10-17 17:18:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:18:01,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:18:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:18:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-10-17 17:18:02,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:18:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860038729] [2022-10-17 17:18:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860038729] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:18:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860120379] [2022-10-17 17:18:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:18:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:18:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:18:02,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:18:02,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aaa0ef19-6ad0-408c-b8eb-19e6f098af26/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:18:03,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:18:03,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:18:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:18:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:18:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-10-17 17:18:03,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:18:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-10-17 17:18:03,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860120379] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:18:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1554726601] [2022-10-17 17:18:03,250 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:18:03,250 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:18:03,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:18:03,251 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:18:03,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:18:03,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,618 INFO L356 Elim1Store]: treesize reduction 703, result has 8.6 percent of original size [2022-10-17 17:18:03,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 17 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 82 [2022-10-17 17:18:03,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:03,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:04,127 INFO L356 Elim1Store]: treesize reduction 984, result has 6.9 percent of original size [2022-10-17 17:18:04,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 51 case distinctions, treesize of input 195 treesize of output 233 [2022-10-17 17:18:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:04,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 20 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-10-17 17:18:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:18:04,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:04,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:04,777 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-10-17 17:18:04,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 788 treesize of output 778 [2022-10-17 17:18:05,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:05,829 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-10-17 17:18:05,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-10-17 17:18:05,861 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:18:05,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:05,952 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:18:05,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:18:05,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,003 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:06,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:06,049 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:18:06,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:06,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,125 INFO L356 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-10-17 17:18:06,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 125 [2022-10-17 17:18:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,229 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:06,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:06,250 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:18:06,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,319 INFO L356 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-10-17 17:18:06,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 135 [2022-10-17 17:18:06,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,428 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:06,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:18:06,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:18:06,449 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:18:06,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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