./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pnr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:43:42,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:43:42,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:43:42,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:43:42,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:43:42,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:43:42,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:43:42,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:43:42,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:43:42,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:43:42,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:43:42,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:43:42,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:43:42,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:43:42,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:43:42,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:43:42,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:43:42,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:43:42,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:43:42,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:43:42,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:43:42,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:43:42,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:43:42,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:43:42,228 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:43:42,232 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:43:42,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:43:42,233 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:43:42,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:43:42,236 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:43:42,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:43:42,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:43:42,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:43:42,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:43:42,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:43:42,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:43:42,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:43:42,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:43:42,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:43:42,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:43:42,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:43:42,248 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:43:42,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:43:42,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:43:42,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:43:42,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:43:42,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:43:42,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:43:42,283 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:43:42,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:43:42,283 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:43:42,284 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:43:42,285 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:43:42,285 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:43:42,285 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:43:42,285 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:43:42,286 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:43:42,286 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:43:42,286 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:43:42,286 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:43:42,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:43:42,287 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:43:42,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:43:42,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:43:42,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:43:42,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:43:42,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:43:42,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:43:42,289 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:43:42,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:43:42,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:43:42,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:43:42,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:43:42,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:43:42,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:42,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:43:42,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:43:42,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:43:42,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:43:42,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:43:42,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:43:42,293 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:43:42,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:43:42,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-11-22 02:43:42,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:43:42,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:43:42,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:43:42,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:43:42,623 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:43:42,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-tiling/pnr3.c [2022-11-22 02:43:45,596 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:43:45,808 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:43:45,809 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/sv-benchmarks/c/array-tiling/pnr3.c [2022-11-22 02:43:45,818 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/data/2d7bc1b8f/80deb97d327b49c39acd8527b10e764b/FLAGfaaaaa1f7 [2022-11-22 02:43:45,837 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/data/2d7bc1b8f/80deb97d327b49c39acd8527b10e764b [2022-11-22 02:43:45,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:43:45,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:43:45,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:45,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:43:45,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:43:45,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:45" (1/1) ... [2022-11-22 02:43:45,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c78def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:45, skipping insertion in model container [2022-11-22 02:43:45,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:45" (1/1) ... [2022-11-22 02:43:45,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:43:45,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:43:46,071 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-11-22 02:43:46,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:46,125 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:43:46,141 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-11-22 02:43:46,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:46,174 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:43:46,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46 WrapperNode [2022-11-22 02:43:46,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:46,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:46,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:43:46,176 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:43:46,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,221 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-11-22 02:43:46,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:46,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:43:46,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:43:46,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:43:46,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,249 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:43:46,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:43:46,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:43:46,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:43:46,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:46,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:46,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:43:46,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:43:46,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:43:46,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:43:46,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:43:46,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:43:46,344 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-11-22 02:43:46,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-11-22 02:43:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:43:46,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:43:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:43:46,420 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:43:46,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:43:46,588 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:43:46,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:43:46,697 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-22 02:43:46,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:46 BoogieIcfgContainer [2022-11-22 02:43:46,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:43:46,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:43:46,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:43:46,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:43:46,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:43:45" (1/3) ... [2022-11-22 02:43:46,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678aa467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:46, skipping insertion in model container [2022-11-22 02:43:46,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46" (2/3) ... [2022-11-22 02:43:46,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678aa467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:46, skipping insertion in model container [2022-11-22 02:43:46,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:46" (3/3) ... [2022-11-22 02:43:46,715 INFO L112 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-11-22 02:43:46,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:43:46,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:43:46,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:43:46,788 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;@47de34d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:43:46,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:43:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:43:46,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:43:46,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:46,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:46,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 455092117, now seen corresponding path program 1 times [2022-11-22 02:43:46,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288669895] [2022-11-22 02:43:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:43:47,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288669895] [2022-11-22 02:43:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288669895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:47,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:47,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:43:47,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766119644] [2022-11-22 02:43:47,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:47,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:43:47,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:47,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:43:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:43:47,368 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:43:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:47,468 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-22 02:43:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:43:47,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 02:43:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:47,483 INFO L225 Difference]: With dead ends: 38 [2022-11-22 02:43:47,483 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 02:43:47,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:43:47,490 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:47,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 18 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:43:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 02:43:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-11-22 02:43:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:43:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-22 02:43:47,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2022-11-22 02:43:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-22 02:43:47,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:43:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-22 02:43:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 02:43:47,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:47,542 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:47,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:43:47,543 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash -162168884, now seen corresponding path program 1 times [2022-11-22 02:43:47,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24852533] [2022-11-22 02:43:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:43:48,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:48,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24852533] [2022-11-22 02:43:48,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24852533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914553323] [2022-11-22 02:43:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:48,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:48,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:43:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 02:43:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:43:49,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-22 02:43:49,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:43:49,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-22 02:43:49,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:43:49,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:43:49,443 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:43:49,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-22 02:43:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:49,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 61 [2022-11-22 02:43:49,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:43:49,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:43:49,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:43:49,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:43:49,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2022-11-22 02:43:49,835 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 02:43:49,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 13 [2022-11-22 02:43:49,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-22 02:43:49,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:43:49,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-11-22 02:43:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:43:49,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914553323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:43:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744873316] [2022-11-22 02:43:49,951 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 02:43:49,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:43:49,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:43:49,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:43:49,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:43:50,060 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:43:50,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:43:50,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:43:50,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:43:50,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-11-22 02:43:50,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:43:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:51,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:51,125 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:43:51,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 869 treesize of output 892 [2022-11-22 02:43:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:43:51,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:43:51,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 697 [2022-11-22 02:43:51,697 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:43:51,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-22 02:43:51,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:43:55,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:55,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:55,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:43:55,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:43:55,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-11-22 02:43:55,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:43:55,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:55,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:55,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:55,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:43:56,756 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:43:56,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:43:58,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '236#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (not (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| |ULTIMATE.start_main_#t~mem12#1|)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:43:58,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:43:58,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:43:58,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2022-11-22 02:43:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450292483] [2022-11-22 02:43:58,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:43:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:43:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:43:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:43:58,337 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-22 02:43:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:43:58,966 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-22 02:43:58,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:43:58,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 20 [2022-11-22 02:43:58,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:43:58,968 INFO L225 Difference]: With dead ends: 41 [2022-11-22 02:43:58,968 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 02:43:58,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 02:43:58,970 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:43:58,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 73 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:43:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 02:43:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-11-22 02:43:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:43:58,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-22 02:43:58,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 20 [2022-11-22 02:43:58,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:43:58,979 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-22 02:43:58,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-22 02:43:58,979 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-22 02:43:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:43:58,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:58,980 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:43:58,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:43:59,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:59,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:59,186 INFO L85 PathProgramCache]: Analyzing trace with hash 670410786, now seen corresponding path program 1 times [2022-11-22 02:43:59,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:59,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92792335] [2022-11-22 02:43:59,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:59,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:43:59,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:59,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92792335] [2022-11-22 02:43:59,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92792335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:43:59,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010917607] [2022-11-22 02:43:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:59,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:43:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:59,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:43:59,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:43:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 02:44:00,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:00,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:00,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:00,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-22 02:44:00,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:44:00,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 02:44:00,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:44:00,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 02:44:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:44:00,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:00,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:00,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:44:00,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:00,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:44:00,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:00,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-22 02:44:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:44:00,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010917607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:00,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811359394] [2022-11-22 02:44:00,696 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:00,696 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:00,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:00,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:00,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:00,769 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:00,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:00,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:44:00,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:00,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-11-22 02:44:00,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:01,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:01,469 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:01,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 892 treesize of output 915 [2022-11-22 02:44:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:01,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:01,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 775 treesize of output 750 [2022-11-22 02:44:01,828 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:01,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-11-22 02:44:01,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:44:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:04,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:04,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:04,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:44:04,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-22 02:44:04,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:04,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:44:04,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:04,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:44:05,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:05,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:06,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:06,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:06,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:06,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:06,519 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:06,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:08,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '510#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:08,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:08,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-22 02:44:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626179421] [2022-11-22 02:44:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:08,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:44:08,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:44:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:44:08,092 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-22 02:44:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:08,804 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-11-22 02:44:08,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:44:08,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 23 [2022-11-22 02:44:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:08,805 INFO L225 Difference]: With dead ends: 43 [2022-11-22 02:44:08,806 INFO L226 Difference]: Without dead ends: 41 [2022-11-22 02:44:08,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:44:08,808 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 144 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:08,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 80 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:44:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-22 02:44:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-11-22 02:44:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 02:44:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-22 02:44:08,818 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2022-11-22 02:44:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:08,818 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-22 02:44:08,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 20 states have internal predecessors, (38), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-22 02:44:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-22 02:44:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:44:08,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:08,820 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:08,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:09,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1558554594, now seen corresponding path program 2 times [2022-11-22 02:44:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823895421] [2022-11-22 02:44:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:44:09,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:09,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823895421] [2022-11-22 02:44:09,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823895421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:09,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185508687] [2022-11-22 02:44:09,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:44:09,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:09,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:09,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:09,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:44:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:44:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:44:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:44:09,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:44:10,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185508687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:10,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42569563] [2022-11-22 02:44:10,022 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:10,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:10,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:10,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:10,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:10,087 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:10,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:10,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:44:10,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:10,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2022-11-22 02:44:10,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:10,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:10,717 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 910 treesize of output 933 [2022-11-22 02:44:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:10,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 739 treesize of output 716 [2022-11-22 02:44:11,233 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:11,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-22 02:44:11,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:44:13,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:13,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:13,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:13,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:44:13,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:13,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:44:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:44:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:14,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:44:14,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:14,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:15,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:15,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:15,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:15,521 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:15,524 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:16,996 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '835#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:16,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:16,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:16,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 22 [2022-11-22 02:44:16,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240922306] [2022-11-22 02:44:16,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:16,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:44:16,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:44:16,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:44:16,998 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:44:17,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:17,304 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-22 02:44:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:44:17,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 29 [2022-11-22 02:44:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:17,305 INFO L225 Difference]: With dead ends: 54 [2022-11-22 02:44:17,305 INFO L226 Difference]: Without dead ends: 39 [2022-11-22 02:44:17,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 02:44:17,307 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:17,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 34 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:44:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-22 02:44:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2022-11-22 02:44:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:44:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-22 02:44:17,328 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 29 [2022-11-22 02:44:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:17,328 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-22 02:44:17,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 02:44:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-22 02:44:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:44:17,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:17,331 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:17,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:17,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-22 02:44:17,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1347359527, now seen corresponding path program 3 times [2022-11-22 02:44:17,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635098410] [2022-11-22 02:44:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:18,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635098410] [2022-11-22 02:44:18,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635098410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:18,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128466176] [2022-11-22 02:44:18,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:44:18,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:18,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:18,447 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:18,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:44:18,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:44:18,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:18,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-22 02:44:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:18,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-22 02:44:18,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-22 02:44:18,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:18,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:44:18,878 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:44:18,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-22 02:44:18,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-22 02:44:18,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:44:18,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-22 02:44:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:19,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:19,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:19,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:44:19,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:19,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:44:19,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:19,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-22 02:44:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:19,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128466176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:19,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850582431] [2022-11-22 02:44:19,806 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:19,806 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:19,806 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:19,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:19,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:19,877 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:44:19,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:44:19,935 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:19,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:20,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:20,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 92 [2022-11-22 02:44:20,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:20,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:20,580 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:20,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 873 treesize of output 896 [2022-11-22 02:44:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:20,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:20,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 717 [2022-11-22 02:44:20,979 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:20,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 496 [2022-11-22 02:44:21,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:44:23,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:23,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:23,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:44:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:23,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:44:23,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:44:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:23,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:44:24,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:24,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:25,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:25,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:25,213 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:25,215 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:26,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1258#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:26,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:26,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:26,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2022-11-22 02:44:26,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099180111] [2022-11-22 02:44:26,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:26,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-22 02:44:26,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-22 02:44:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1690, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 02:44:26,804 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 02:44:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:28,716 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2022-11-22 02:44:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 02:44:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 42 [2022-11-22 02:44:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:28,719 INFO L225 Difference]: With dead ends: 74 [2022-11-22 02:44:28,719 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 02:44:28,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=565, Invalid=3725, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 02:44:28,722 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 251 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:28,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 124 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:44:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 02:44:28,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 36. [2022-11-22 02:44:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:44:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-22 02:44:28,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 42 [2022-11-22 02:44:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:28,740 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-22 02:44:28,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 02:44:28,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-22 02:44:28,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:44:28,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:28,742 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:28,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:28,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:28,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1582105589, now seen corresponding path program 4 times [2022-11-22 02:44:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962378964] [2022-11-22 02:44:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:28,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:29,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962378964] [2022-11-22 02:44:29,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962378964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:29,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927878540] [2022-11-22 02:44:29,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:44:29,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:29,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:29,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:29,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:44:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-22 02:44:29,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:29,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:29,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-22 02:44:30,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:44:30,015 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:44:30,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:44:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:30,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:30,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:30,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:44:30,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-22 02:44:30,532 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 02:44:30,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-22 02:44:30,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:30,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-22 02:44:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:30,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927878540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:30,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709691895] [2022-11-22 02:44:30,697 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:30,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:30,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:30,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:30,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:30,764 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:30,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:30,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:44:30,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:30,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:30,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:30,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-11-22 02:44:30,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:31,385 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:31,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-11-22 02:44:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:31,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:31,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-11-22 02:44:31,635 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:31,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-11-22 02:44:31,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:44:34,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:34,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:34,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:34,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:44:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:34,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:44:34,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:44:34,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:34,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:44:34,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:34,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:35,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:36,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:36,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:36,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:36,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:36,406 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:36,408 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:38,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1769#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:38,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:38,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:38,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 29 [2022-11-22 02:44:38,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879356293] [2022-11-22 02:44:38,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:38,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-22 02:44:38,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:38,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-22 02:44:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 02:44:38,023 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 02:44:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:40,649 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2022-11-22 02:44:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 02:44:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) Word has length 45 [2022-11-22 02:44:40,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:40,651 INFO L225 Difference]: With dead ends: 107 [2022-11-22 02:44:40,651 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 02:44:40,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=756, Invalid=5406, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 02:44:40,653 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 242 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:40,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 237 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:44:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 02:44:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 42. [2022-11-22 02:44:40,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 02:44:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-22 02:44:40,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 45 [2022-11-22 02:44:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:40,673 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-22 02:44:40,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2022-11-22 02:44:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-22 02:44:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:44:40,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:40,675 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:40,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:40,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:40,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1496344203, now seen corresponding path program 5 times [2022-11-22 02:44:40,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:40,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316107376] [2022-11-22 02:44:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:40,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 41 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:41,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:41,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316107376] [2022-11-22 02:44:41,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316107376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:41,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194425721] [2022-11-22 02:44:41,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:44:41,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:41,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:41,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:41,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:44:41,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-22 02:44:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:44:41,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:42,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 57 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-22 02:44:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194425721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451270443] [2022-11-22 02:44:42,517 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:42,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:42,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:42,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:42,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:42,586 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:42,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:42,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:44:42,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:42,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 114 [2022-11-22 02:44:42,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:43,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:43,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:43,174 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:43,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 876 treesize of output 899 [2022-11-22 02:44:43,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:43,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:43,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 687 treesize of output 670 [2022-11-22 02:44:43,581 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:43,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-22 02:44:43,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:44:45,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:45,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:45,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:44:45,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:44:45,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:44:45,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:44:46,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:46,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:47,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:47,290 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:47,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:48,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2405#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:48,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:48,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:48,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 34 [2022-11-22 02:44:48,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519742502] [2022-11-22 02:44:48,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:48,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 02:44:48,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:48,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 02:44:48,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:44:48,823 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-22 02:44:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:49,230 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2022-11-22 02:44:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 02:44:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 51 [2022-11-22 02:44:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:49,231 INFO L225 Difference]: With dead ends: 79 [2022-11-22 02:44:49,232 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 02:44:49,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 02:44:49,233 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:49,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 74 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:44:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 02:44:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-22 02:44:49,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 02:44:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-22 02:44:49,252 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 51 [2022-11-22 02:44:49,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:49,253 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-22 02:44:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 states have internal predecessors, (94), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-22 02:44:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-22 02:44:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-22 02:44:49,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:49,254 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 02:44:49,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:44:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:49,457 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1041581268, now seen corresponding path program 6 times [2022-11-22 02:44:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:49,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003294173] [2022-11-22 02:44:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:44:50,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:50,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003294173] [2022-11-22 02:44:50,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003294173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:44:50,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775140846] [2022-11-22 02:44:50,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:44:50,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:44:50,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:44:50,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:44:50,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:44:50,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:44:50,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:44:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-22 02:44:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:44:50,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:50,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:50,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:44:50,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-22 02:44:50,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-11-22 02:44:50,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:44:50,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:50,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-11-22 02:44:50,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-11-22 02:44:50,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-22 02:44:51,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-22 02:44:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:44:51,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:44:51,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:51,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:44:51,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:51,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:44:51,773 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:44:51,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-11-22 02:44:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:44:52,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775140846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:44:52,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965944570] [2022-11-22 02:44:52,025 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:44:52,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:44:52,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:44:52,026 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:44:52,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:44:52,092 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:44:52,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:44:52,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:44:52,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:44:52,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-11-22 02:44:52,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:44:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:52,644 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:44:52,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-11-22 02:44:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:52,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:44:52,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-11-22 02:44:53,072 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:44:53,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-11-22 02:44:53,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:44:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:55,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:44:55,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:55,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:44:55,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:55,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:44:55,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:44:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:44:55,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:44:55,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:55,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:55,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:55,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:44:56,610 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:44:56,614 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:44:58,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3028#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:44:58,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:44:58,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:44:58,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-11-22 02:44:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580524813] [2022-11-22 02:44:58,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:44:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:44:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:58,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:44:58,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:44:58,403 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-11-22 02:45:03,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:03,497 INFO L93 Difference]: Finished difference Result 156 states and 201 transitions. [2022-11-22 02:45:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-22 02:45:03,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) Word has length 64 [2022-11-22 02:45:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:03,499 INFO L225 Difference]: With dead ends: 156 [2022-11-22 02:45:03,499 INFO L226 Difference]: Without dead ends: 154 [2022-11-22 02:45:03,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4167 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1483, Invalid=12323, Unknown=0, NotChecked=0, Total=13806 [2022-11-22 02:45:03,504 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 454 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:03,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 310 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 02:45:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-22 02:45:03,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 55. [2022-11-22 02:45:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 02:45:03,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-22 02:45:03,535 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 64 [2022-11-22 02:45:03,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:03,536 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-22 02:45:03,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 13 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-11-22 02:45:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-22 02:45:03,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 02:45:03,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:03,537 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:03,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 02:45:03,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:03,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash 310299500, now seen corresponding path program 7 times [2022-11-22 02:45:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:03,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044986309] [2022-11-22 02:45:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:04,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044986309] [2022-11-22 02:45:04,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044986309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:04,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059378845] [2022-11-22 02:45:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:45:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:04,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:04,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:45:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:04,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-22 02:45:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:04,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-22 02:45:04,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:45:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:05,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:05,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:05,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:45:05,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:05,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:45:05,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:05,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-22 02:45:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:05,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059378845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:45:05,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144409210] [2022-11-22 02:45:05,952 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:45:05,953 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:45:05,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:45:05,953 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:45:05,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:45:06,014 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:45:06,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:45:06,069 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:45:06,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:45:06,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:45:06,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 101 [2022-11-22 02:45:06,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:45:06,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:06,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:06,558 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:45:06,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 869 treesize of output 892 [2022-11-22 02:45:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:06,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 716 treesize of output 697 [2022-11-22 02:45:07,012 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:45:07,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-22 02:45:07,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:45:09,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:09,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:09,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:45:09,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:09,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-11-22 02:45:09,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:45:09,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:09,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:09,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:09,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:10,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:11,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:11,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:11,293 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:45:11,295 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:45:13,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3932#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:45:13,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:45:13,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:45:13,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 38 [2022-11-22 02:45:13,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899146150] [2022-11-22 02:45:13,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:45:13,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 02:45:13,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:13,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 02:45:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 02:45:13,134 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-22 02:45:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:21,340 INFO L93 Difference]: Finished difference Result 227 states and 283 transitions. [2022-11-22 02:45:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-22 02:45:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 70 [2022-11-22 02:45:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:21,344 INFO L225 Difference]: With dead ends: 227 [2022-11-22 02:45:21,344 INFO L226 Difference]: Without dead ends: 225 [2022-11-22 02:45:21,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2024, Invalid=20028, Unknown=0, NotChecked=0, Total=22052 [2022-11-22 02:45:21,353 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 616 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:21,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 382 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-22 02:45:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-22 02:45:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 58. [2022-11-22 02:45:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-22 02:45:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-11-22 02:45:21,410 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 70 [2022-11-22 02:45:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:21,411 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-11-22 02:45:21,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.710526315789474) internal successors, (103), 37 states have internal predecessors, (103), 9 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-22 02:45:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-11-22 02:45:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 02:45:21,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:21,419 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:21,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-22 02:45:21,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1368209538, now seen corresponding path program 8 times [2022-11-22 02:45:21,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:21,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824786075] [2022-11-22 02:45:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 101 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:22,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824786075] [2022-11-22 02:45:22,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824786075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:22,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36785236] [2022-11-22 02:45:22,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:45:22,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:22,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:22,295 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:22,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:45:23,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-22 02:45:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:45:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:45:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 126 proven. 24 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:23,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 126 proven. 24 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-22 02:45:24,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36785236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:45:24,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567440817] [2022-11-22 02:45:24,338 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:45:24,338 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:45:24,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:45:24,339 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:45:24,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:45:24,402 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:45:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:45:24,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:45:24,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:45:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 118 [2022-11-22 02:45:24,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:45:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:24,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:24,934 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:45:24,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 887 treesize of output 910 [2022-11-22 02:45:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:24,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:24,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 680 treesize of output 663 [2022-11-22 02:45:25,286 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:45:25,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 520 [2022-11-22 02:45:25,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:27,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:27,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:27,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:45:27,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:45:27,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:27,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:45:28,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:28,951 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:45:28,953 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:45:30,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5029#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:45:30,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:45:30,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:45:30,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 16] total 46 [2022-11-22 02:45:30,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922631846] [2022-11-22 02:45:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:45:30,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 02:45:30,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 02:45:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=2988, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:45:30,625 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-22 02:45:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:31,229 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-11-22 02:45:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:45:31,229 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 73 [2022-11-22 02:45:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:31,230 INFO L225 Difference]: With dead ends: 104 [2022-11-22 02:45:31,231 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 02:45:31,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=702, Invalid=3720, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 02:45:31,232 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 149 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:31,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 90 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:45:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 02:45:31,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2022-11-22 02:45:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-22 02:45:31,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-11-22 02:45:31,264 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 73 [2022-11-22 02:45:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:31,264 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-11-22 02:45:31,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2022-11-22 02:45:31,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-11-22 02:45:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-22 02:45:31,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:31,266 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:31,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:31,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:31,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:31,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -996268295, now seen corresponding path program 9 times [2022-11-22 02:45:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:31,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380269804] [2022-11-22 02:45:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:32,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380269804] [2022-11-22 02:45:32,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380269804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:32,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850235722] [2022-11-22 02:45:32,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:45:32,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:32,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:32,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:45:33,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:45:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:45:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-22 02:45:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:33,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:33,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:33,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:45:33,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:33,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-22 02:45:33,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-11-22 02:45:33,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:33,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-11-22 02:45:33,728 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:45:33,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2022-11-22 02:45:33,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-11-22 02:45:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:34,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:34,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:34,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:45:34,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:34,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:45:34,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:45:34,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 43 [2022-11-22 02:45:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850235722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:45:35,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1810381275] [2022-11-22 02:45:35,243 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:45:35,243 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:45:35,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:45:35,243 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:45:35,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:45:35,306 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:45:35,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:45:35,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:45:35,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:45:35,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 92 [2022-11-22 02:45:35,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:45:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:35,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:35,776 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:45:35,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 873 treesize of output 896 [2022-11-22 02:45:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:35,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:35,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 738 treesize of output 717 [2022-11-22 02:45:36,129 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:45:36,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-22 02:45:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:38,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:45:38,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:45:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:38,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:45:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:38,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:45:38,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:45:38,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:38,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:45:39,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:39,908 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:45:39,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:45:41,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5854#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:45:41,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:45:41,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:45:41,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 21] total 48 [2022-11-22 02:45:41,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813284925] [2022-11-22 02:45:41,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:45:41,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 02:45:41,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 02:45:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3481, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 02:45:41,929 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-22 02:45:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:53,599 INFO L93 Difference]: Finished difference Result 255 states and 316 transitions. [2022-11-22 02:45:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-22 02:45:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) Word has length 86 [2022-11-22 02:45:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:53,604 INFO L225 Difference]: With dead ends: 255 [2022-11-22 02:45:53,604 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 02:45:53,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10983 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2968, Invalid=30704, Unknown=0, NotChecked=0, Total=33672 [2022-11-22 02:45:53,608 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 564 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 4079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:53,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 431 Invalid, 4079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 3385 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-22 02:45:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 02:45:53,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 74. [2022-11-22 02:45:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-22 02:45:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2022-11-22 02:45:53,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 86 [2022-11-22 02:45:53,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:53,653 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2022-11-22 02:45:53,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 16 states have call successors, (36), 1 states have call predecessors, (36), 1 states have return successors, (36), 16 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-22 02:45:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2022-11-22 02:45:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-22 02:45:53,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:53,655 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 02:45:53,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:45:53,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:53,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:53,858 INFO L85 PathProgramCache]: Analyzing trace with hash -112082091, now seen corresponding path program 10 times [2022-11-22 02:45:53,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:53,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552534952] [2022-11-22 02:45:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:53,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 188 proven. 80 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:54,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552534952] [2022-11-22 02:45:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552534952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:45:54,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139193442] [2022-11-22 02:45:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:45:54,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:45:54,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:45:54,772 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:45:54,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:45:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:45:54,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:45:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:55,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:45:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 222 proven. 46 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 02:45:56,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139193442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:45:56,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1023142469] [2022-11-22 02:45:56,554 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:45:56,554 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:45:56,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:45:56,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:45:56,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:45:56,614 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:45:56,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:45:56,694 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:45:56,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:45:56,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:45:56,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 96 [2022-11-22 02:45:56,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:45:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:57,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:57,154 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:45:57,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 884 treesize of output 907 [2022-11-22 02:45:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:45:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:45:57,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 731 treesize of output 710 [2022-11-22 02:45:57,411 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:45:57,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-22 02:45:57,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:59,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:59,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:45:59,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:45:59,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:45:59,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:45:59,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:46:00,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:00,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:01,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:01,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:01,245 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:46:01,247 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:46:03,072 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7207#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:46:03,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:46:03,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:46:03,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 20] total 58 [2022-11-22 02:46:03,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704914233] [2022-11-22 02:46:03,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:46:03,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 02:46:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 02:46:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=4273, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:46:03,075 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-22 02:46:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:46:03,732 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2022-11-22 02:46:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:46:03,733 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) Word has length 95 [2022-11-22 02:46:03,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:46:03,734 INFO L225 Difference]: With dead ends: 129 [2022-11-22 02:46:03,734 INFO L226 Difference]: Without dead ends: 87 [2022-11-22 02:46:03,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1040, Invalid=5280, Unknown=0, NotChecked=0, Total=6320 [2022-11-22 02:46:03,736 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 134 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:46:03,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 135 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:46:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-22 02:46:03,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-11-22 02:46:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:46:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-22 02:46:03,789 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 95 [2022-11-22 02:46:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:46:03,790 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-22 02:46:03,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 58 states have internal predecessors, (172), 12 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 12 states have call predecessors, (36), 12 states have call successors, (36) [2022-11-22 02:46:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-22 02:46:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-22 02:46:03,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:46:03,791 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 12, 12, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-22 02:46:03,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:46:03,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 02:46:03,997 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:46:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:46:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1508535948, now seen corresponding path program 11 times [2022-11-22 02:46:03,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:46:03,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441966892] [2022-11-22 02:46:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:46:03,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:46:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:46:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:46:05,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:46:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441966892] [2022-11-22 02:46:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441966892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:46:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871555766] [2022-11-22 02:46:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:46:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:46:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:46:05,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:46:05,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:46:07,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-22 02:46:07,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:46:07,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-22 02:46:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:46:08,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-22 02:46:08,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:46:08,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-22 02:46:08,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:46:10,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:46:10,499 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:46:10,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-22 02:46:12,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:46:12,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-22 02:46:12,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-22 02:46:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 52 proven. 297 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-22 02:46:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:46:46,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:46:46,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:46:46,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-22 02:46:46,446 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 02:46:46,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-22 02:46:46,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:46:46,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-22 02:46:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:46:46,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871555766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:46:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [852126238] [2022-11-22 02:46:46,846 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:46:46,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:46:46,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:46:46,847 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:46:46,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:46:46,906 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:46:46,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:46:46,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:46:47,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:46:47,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-11-22 02:46:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:46:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:47,421 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:46:47,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 906 treesize of output 929 [2022-11-22 02:46:47,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:47,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:46:47,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 717 treesize of output 696 [2022-11-22 02:46:47,623 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:46:47,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-22 02:46:47,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:46:49,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:46:49,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:46:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:50,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:46:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:50,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:46:50,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:46:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:46:50,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:46:50,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:50,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:51,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:51,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:51,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:46:51,390 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:46:51,392 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:46:57,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8244#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:46:57,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:46:57,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:46:57,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 68 [2022-11-22 02:46:57,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107708192] [2022-11-22 02:46:57,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:46:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-22 02:46:57,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:46:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-22 02:46:57,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=6266, Unknown=17, NotChecked=0, Total=6642 [2022-11-22 02:46:57,658 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2022-11-22 02:47:04,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:47:06,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:47:08,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:47:10,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:47:13,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:47:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:47:39,210 INFO L93 Difference]: Finished difference Result 375 states and 453 transitions. [2022-11-22 02:47:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-11-22 02:47:39,211 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) Word has length 108 [2022-11-22 02:47:39,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:47:39,213 INFO L225 Difference]: With dead ends: 375 [2022-11-22 02:47:39,213 INFO L226 Difference]: Without dead ends: 373 [2022-11-22 02:47:39,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 261 SyntacticMatches, 11 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21638 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=4916, Invalid=64497, Unknown=19, NotChecked=0, Total=69432 [2022-11-22 02:47:39,222 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 999 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 6979 mSolverCounterSat, 1531 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 8515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1531 IncrementalHoareTripleChecker+Valid, 6979 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:47:39,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 719 Invalid, 8515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1531 Valid, 6979 Invalid, 5 Unknown, 0 Unchecked, 17.5s Time] [2022-11-22 02:47:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-22 02:47:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 84. [2022-11-22 02:47:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:47:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-22 02:47:39,284 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 108 [2022-11-22 02:47:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:47:39,285 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-22 02:47:39,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.735294117647059) internal successors, (186), 68 states have internal predecessors, (186), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 18 states have call predecessors, (45), 18 states have call successors, (45) [2022-11-22 02:47:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-22 02:47:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 02:47:39,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:47:39,287 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-22 02:47:39,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:47:39,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:47:39,502 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:47:39,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:47:39,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1737932446, now seen corresponding path program 12 times [2022-11-22 02:47:39,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:47:39,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317174807] [2022-11-22 02:47:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:47:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:47:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:47:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:47:40,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:47:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317174807] [2022-11-22 02:47:40,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317174807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:47:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593754098] [2022-11-22 02:47:40,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:47:40,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:47:40,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:47:40,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:47:40,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:47:41,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:47:41,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:47:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-22 02:47:41,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:47:41,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 49 [2022-11-22 02:47:41,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-11-22 02:47:41,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:47:41,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:47:42,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:47:42,045 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 02:47:42,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-22 02:47:42,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-22 02:47:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:47:43,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:47:44,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:47:44,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:47:44,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:47:44,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:47:44,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:47:44,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 39 [2022-11-22 02:47:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:47:45,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593754098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:47:45,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506425954] [2022-11-22 02:47:45,197 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:47:45,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:47:45,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:47:45,198 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:47:45,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:47:45,270 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:47:45,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:47:45,327 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:47:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:47:45,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:47:45,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-11-22 02:47:45,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:47:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:47:45,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:47:45,807 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:47:45,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 865 treesize of output 888 [2022-11-22 02:47:45,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:45,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 694 treesize of output 677 [2022-11-22 02:47:46,026 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:47:46,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 500 [2022-11-22 02:47:46,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:47:48,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:47:48,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:47:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:48,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:47:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:48,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:47:48,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:47:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:47:48,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:47:48,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:48,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:47:49,758 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:47:49,760 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:47:52,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10015#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:47:52,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:47:52,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:47:52,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 71 [2022-11-22 02:47:52,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926621025] [2022-11-22 02:47:52,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:47:52,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 02:47:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:47:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 02:47:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=6767, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 02:47:52,206 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-22 02:48:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:17,290 INFO L93 Difference]: Finished difference Result 426 states and 508 transitions. [2022-11-22 02:48:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-22 02:48:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) Word has length 111 [2022-11-22 02:48:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:17,294 INFO L225 Difference]: With dead ends: 426 [2022-11-22 02:48:17,294 INFO L226 Difference]: Without dead ends: 424 [2022-11-22 02:48:17,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 272 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28753 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=6390, Invalid=79166, Unknown=0, NotChecked=0, Total=85556 [2022-11-22 02:48:17,299 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1107 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 5810 mSolverCounterSat, 2238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 8048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2238 IncrementalHoareTripleChecker+Valid, 5810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:17,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 687 Invalid, 8048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2238 Valid, 5810 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-22 02:48:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-22 02:48:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 87. [2022-11-22 02:48:17,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:48:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-11-22 02:48:17,357 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 111 [2022-11-22 02:48:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:17,357 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-11-22 02:48:17,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.7464788732394365) internal successors, (195), 70 states have internal predecessors, (195), 19 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 20 states have call predecessors, (45), 19 states have call successors, (45) [2022-11-22 02:48:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-11-22 02:48:17,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-22 02:48:17,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:17,359 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-22 02:48:17,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:48:17,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:48:17,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:48:17,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1090680524, now seen corresponding path program 13 times [2022-11-22 02:48:17,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:17,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095131278] [2022-11-22 02:48:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:48:18,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:18,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095131278] [2022-11-22 02:48:18,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095131278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:48:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105570433] [2022-11-22 02:48:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:48:18,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:48:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:48:18,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:48:18,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:48:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:19,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 02:48:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:48:19,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 43 [2022-11-22 02:48:19,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-11-22 02:48:19,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:48:19,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-22 02:48:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:48:20,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:48:20,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:48:20,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:48:20,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-22 02:48:20,751 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 02:48:20,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-22 02:48:20,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:48:20,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-22 02:48:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:48:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105570433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:48:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127366333] [2022-11-22 02:48:21,229 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:48:21,229 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:48:21,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:48:21,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:48:21,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:48:21,329 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:48:21,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:48:21,379 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:48:21,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:48:21,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:48:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 123 [2022-11-22 02:48:21,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:48:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:48:21,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:48:21,845 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:48:21,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 872 treesize of output 895 [2022-11-22 02:48:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:48:21,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:48:21,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 665 treesize of output 650 [2022-11-22 02:48:22,089 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:48:22,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-22 02:48:22,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 396 [2022-11-22 02:48:24,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:24,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:24,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:48:24,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:48:24,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 166 [2022-11-22 02:48:24,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:48:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:25,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:48:26,509 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:48:26,510 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:48:28,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11910#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:48:28,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:48:28,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:48:28,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 55 [2022-11-22 02:48:28,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168051514] [2022-11-22 02:48:28,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:48:28,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-22 02:48:28,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:48:28,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-22 02:48:28,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4433, Unknown=0, NotChecked=0, Total=4692 [2022-11-22 02:48:28,813 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-11-22 02:48:57,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:48:57,316 INFO L93 Difference]: Finished difference Result 486 states and 576 transitions. [2022-11-22 02:48:57,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-22 02:48:57,317 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) Word has length 114 [2022-11-22 02:48:57,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:48:57,318 INFO L225 Difference]: With dead ends: 486 [2022-11-22 02:48:57,318 INFO L226 Difference]: Without dead ends: 484 [2022-11-22 02:48:57,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34280 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=5837, Invalid=89335, Unknown=0, NotChecked=0, Total=95172 [2022-11-22 02:48:57,326 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1161 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 6572 mSolverCounterSat, 1674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 8246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1674 IncrementalHoareTripleChecker+Valid, 6572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:48:57,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 1094 Invalid, 8246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1674 Valid, 6572 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-11-22 02:48:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-22 02:48:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 90. [2022-11-22 02:48:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-22 02:48:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2022-11-22 02:48:57,393 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 114 [2022-11-22 02:48:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:48:57,394 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2022-11-22 02:48:57,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 55 states have internal predecessors, (163), 15 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-11-22 02:48:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2022-11-22 02:48:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 02:48:57,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:48:57,395 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-11-22 02:48:57,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:48:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:48:57,602 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:48:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:48:57,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1041322274, now seen corresponding path program 14 times [2022-11-22 02:48:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:48:57,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123028142] [2022-11-22 02:48:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:48:57,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:48:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:48:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 302 proven. 118 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:48:58,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:48:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123028142] [2022-11-22 02:48:58,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123028142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:48:58,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895520778] [2022-11-22 02:48:58,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:48:58,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:48:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:48:58,807 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:48:58,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:49:02,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-22 02:49:02,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:49:03,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:49:03,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:49:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 345 proven. 75 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:49:04,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:49:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 345 proven. 75 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-11-22 02:49:05,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895520778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:49:05,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463049606] [2022-11-22 02:49:05,333 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:49:05,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:49:05,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:49:05,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:49:05,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:49:05,387 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:49:05,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:49:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:49:05,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:49:05,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 106 [2022-11-22 02:49:05,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:49:05,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:05,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:05,917 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:49:05,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 854 treesize of output 877 [2022-11-22 02:49:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:05,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 701 treesize of output 684 [2022-11-22 02:49:06,245 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:49:06,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-11-22 02:49:06,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:49:08,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:49:08,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:49:08,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:08,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:49:08,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:08,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:49:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:49:08,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:08,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:49:09,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:09,999 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:49:10,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:49:12,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13991#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:49:12,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:49:12,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:49:12,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 24] total 71 [2022-11-22 02:49:12,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778175269] [2022-11-22 02:49:12,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:49:12,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-22 02:49:12,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:49:12,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-22 02:49:12,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=5909, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 02:49:12,125 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-11-22 02:49:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:49:13,042 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2022-11-22 02:49:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 02:49:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) Word has length 117 [2022-11-22 02:49:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:49:13,044 INFO L225 Difference]: With dead ends: 154 [2022-11-22 02:49:13,044 INFO L226 Difference]: Without dead ends: 103 [2022-11-22 02:49:13,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3721 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1499, Invalid=7243, Unknown=0, NotChecked=0, Total=8742 [2022-11-22 02:49:13,045 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 288 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:49:13,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 167 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:49:13,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-22 02:49:13,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2022-11-22 02:49:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-22 02:49:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2022-11-22 02:49:13,120 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 117 [2022-11-22 02:49:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:49:13,120 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2022-11-22 02:49:13,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.9859154929577465) internal successors, (212), 71 states have internal predecessors, (212), 15 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 15 states have call predecessors, (45), 15 states have call successors, (45) [2022-11-22 02:49:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2022-11-22 02:49:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-22 02:49:13,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:49:13,122 INFO L195 NwaCegarLoop]: trace histogram [18, 16, 15, 15, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-22 02:49:13,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:49:13,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:49:13,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:49:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:49:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1364219623, now seen corresponding path program 15 times [2022-11-22 02:49:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:49:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826581209] [2022-11-22 02:49:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:49:13,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:49:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:49:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:49:15,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:49:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826581209] [2022-11-22 02:49:15,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826581209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:49:15,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249404376] [2022-11-22 02:49:15,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:49:15,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:49:15,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:49:15,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:49:15,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:49:15,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:49:15,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:49:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-22 02:49:15,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:49:16,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:16,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-22 02:49:16,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:49:16,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:49:16,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:49:16,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2022-11-22 02:49:16,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:49:16,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 87 [2022-11-22 02:49:16,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-22 02:49:16,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2022-11-22 02:49:16,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-11-22 02:49:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:49:18,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:49:18,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:49:18,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:49:18,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-22 02:49:18,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:49:18,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:49:18,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:49:18,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 34 [2022-11-22 02:49:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:49:19,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249404376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:49:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733574208] [2022-11-22 02:49:19,042 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:49:19,042 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:49:19,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:49:19,043 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:49:19,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:49:19,106 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:49:19,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:49:19,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:49:19,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:49:19,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 110 [2022-11-22 02:49:19,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:49:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:19,623 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:49:19,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 865 treesize of output 888 [2022-11-22 02:49:19,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:49:19,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 694 treesize of output 677 [2022-11-22 02:49:19,964 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:49:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-11-22 02:49:20,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:49:22,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:49:22,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:49:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:49:22,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:49:22,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:49:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:49:22,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:49:22,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:22,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:22,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:49:23,695 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:49:23,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:49:26,224 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15216#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:49:26,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:49:26,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:49:26,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 28] total 64 [2022-11-22 02:49:26,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007620860] [2022-11-22 02:49:26,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:49:26,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-22 02:49:26,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:49:26,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-22 02:49:26,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=5659, Unknown=0, NotChecked=0, Total=6006 [2022-11-22 02:49:26,226 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) [2022-11-22 02:50:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:02,784 INFO L93 Difference]: Finished difference Result 526 states and 621 transitions. [2022-11-22 02:50:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-11-22 02:50:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) Word has length 130 [2022-11-22 02:50:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:02,787 INFO L225 Difference]: With dead ends: 526 [2022-11-22 02:50:02,788 INFO L226 Difference]: Without dead ends: 524 [2022-11-22 02:50:02,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 339 SyntacticMatches, 2 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41694 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=6959, Invalid=108301, Unknown=0, NotChecked=0, Total=115260 [2022-11-22 02:50:02,792 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 984 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 7917 mSolverCounterSat, 1600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 9517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1600 IncrementalHoareTripleChecker+Valid, 7917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:02,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1092 Invalid, 9517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1600 Valid, 7917 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-22 02:50:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-22 02:50:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 106. [2022-11-22 02:50:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-22 02:50:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-11-22 02:50:02,869 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 130 [2022-11-22 02:50:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:02,869 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-11-22 02:50:02,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.828125) internal successors, (181), 63 states have internal predecessors, (181), 22 states have call successors, (54), 1 states have call predecessors, (54), 1 states have return successors, (54), 22 states have call predecessors, (54), 22 states have call successors, (54) [2022-11-22 02:50:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-11-22 02:50:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-22 02:50:02,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:02,871 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:02,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:03,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:03,078 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:50:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1493129931, now seen corresponding path program 16 times [2022-11-22 02:50:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:50:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061946271] [2022-11-22 02:50:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:50:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 443 proven. 163 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:50:04,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:50:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061946271] [2022-11-22 02:50:04,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061946271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:50:04,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550408356] [2022-11-22 02:50:04,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:50:04,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:04,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:04,492 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:04,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:50:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 02:50:04,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:50:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 495 proven. 111 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:50:06,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:50:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 495 proven. 111 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2022-11-22 02:50:07,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550408356] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:50:07,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510084320] [2022-11-22 02:50:07,663 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:50:07,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:50:07,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:50:07,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:50:07,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:50:07,727 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:50:07,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:50:07,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:50:07,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:50:07,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 105 [2022-11-22 02:50:07,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:50:08,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:08,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:08,197 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:50:08,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 880 treesize of output 903 [2022-11-22 02:50:08,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:50:08,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:50:08,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 709 treesize of output 690 [2022-11-22 02:50:08,520 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:50:08,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-11-22 02:50:08,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:50:10,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:10,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:10,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:50:10,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:50:10,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:50:10,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:50:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:11,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:12,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:12,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:50:12,173 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:50:12,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:50:14,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17563#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:50:14,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:50:14,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:50:14,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 28] total 83 [2022-11-22 02:50:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312553401] [2022-11-22 02:50:14,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:50:14,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-22 02:50:14,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:50:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-22 02:50:14,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1654, Invalid=7658, Unknown=0, NotChecked=0, Total=9312 [2022-11-22 02:50:14,415 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) [2022-11-22 02:50:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:50:15,490 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2022-11-22 02:50:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-22 02:50:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) Word has length 139 [2022-11-22 02:50:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:50:15,492 INFO L225 Difference]: With dead ends: 179 [2022-11-22 02:50:15,492 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 02:50:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1988, Invalid=9354, Unknown=0, NotChecked=0, Total=11342 [2022-11-22 02:50:15,494 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 270 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:50:15,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 214 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:50:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 02:50:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-11-22 02:50:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.0222222222222221) internal successors, (92), 90 states have internal predecessors, (92), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 02:50:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 134 transitions. [2022-11-22 02:50:15,597 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 134 transitions. Word has length 139 [2022-11-22 02:50:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:50:15,597 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 134 transitions. [2022-11-22 02:50:15,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.0240963855421685) internal successors, (251), 83 states have internal predecessors, (251), 18 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (54), 18 states have call predecessors, (54), 18 states have call successors, (54) [2022-11-22 02:50:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 134 transitions. [2022-11-22 02:50:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-22 02:50:15,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:50:15,598 INFO L195 NwaCegarLoop]: trace histogram [21, 19, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:50:15,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:50:15,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:50:15,799 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:50:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:50:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 504273388, now seen corresponding path program 17 times [2022-11-22 02:50:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:50:15,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87903445] [2022-11-22 02:50:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:50:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:50:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:50:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:50:18,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:50:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87903445] [2022-11-22 02:50:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87903445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:50:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373759820] [2022-11-22 02:50:18,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:50:18,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:50:18,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:50:18,130 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:50:18,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:51:13,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-22 02:51:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:51:13,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-22 02:51:13,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:51:13,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:51:13,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:51:48,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 77 [2022-11-22 02:51:48,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2022-11-22 02:51:48,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2022-11-22 02:51:48,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2022-11-22 02:52:22,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:52:22,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:52:22,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-22 02:52:22,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-11-22 02:52:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 76 proven. 649 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-22 02:52:23,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:52:26,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:52:26,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:52:26,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-11-22 02:52:26,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2022-11-22 02:52:26,601 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 02:52:26,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 13 [2022-11-22 02:52:26,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:52:26,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-22 02:52:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 649 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:52:27,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373759820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:52:27,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161277207] [2022-11-22 02:52:27,217 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:52:27,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:52:27,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:52:27,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:52:27,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:52:27,272 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:52:27,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:52:27,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:52:27,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:52:27,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 109 [2022-11-22 02:52:27,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:52:27,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:52:27,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:52:27,759 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:52:27,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 891 treesize of output 914 [2022-11-22 02:52:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:52:27,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 683 [2022-11-22 02:52:28,133 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:52:28,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 508 [2022-11-22 02:52:28,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:52:30,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:52:30,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:52:30,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:30,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:52:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:30,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:52:30,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:52:30,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:52:30,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:52:30,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:30,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:52:31,789 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:52:31,791 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:52:38,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18989#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:52:38,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:52:38,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:52:38,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 73 [2022-11-22 02:52:38,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498187906] [2022-11-22 02:52:38,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:52:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-22 02:52:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:52:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-22 02:52:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=7067, Unknown=20, NotChecked=0, Total=7482 [2022-11-22 02:52:38,389 INFO L87 Difference]: Start difference. First operand 113 states and 134 transitions. Second operand has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) [2022-11-22 02:53:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:53:57,068 INFO L93 Difference]: Finished difference Result 695 states and 807 transitions. [2022-11-22 02:53:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 386 states. [2022-11-22 02:53:57,069 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) Word has length 152 [2022-11-22 02:53:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:53:57,073 INFO L225 Difference]: With dead ends: 695 [2022-11-22 02:53:57,073 INFO L226 Difference]: Without dead ends: 693 [2022-11-22 02:53:57,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 396 SyntacticMatches, 6 SemanticMatches, 468 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87180 ImplicationChecksByTransitivity, 148.2s TimeCoverageRelationStatistics Valid=11037, Invalid=209371, Unknown=22, NotChecked=0, Total=220430 [2022-11-22 02:53:57,082 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1028 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 9455 mSolverCounterSat, 2319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1028 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 11774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2319 IncrementalHoareTripleChecker+Valid, 9455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:53:57,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1028 Valid, 882 Invalid, 11774 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2319 Valid, 9455 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-22 02:53:57,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-11-22 02:53:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 116. [2022-11-22 02:53:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 02:53:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2022-11-22 02:53:57,193 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 152 [2022-11-22 02:53:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:53:57,194 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2022-11-22 02:53:57,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9315068493150687) internal successors, (214), 73 states have internal predecessors, (214), 24 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 24 states have call predecessors, (63), 24 states have call successors, (63) [2022-11-22 02:53:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2022-11-22 02:53:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-22 02:53:57,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:53:57,196 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:53:57,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:53:57,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:57,410 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:53:57,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:53:57,410 INFO L85 PathProgramCache]: Analyzing trace with hash -981673470, now seen corresponding path program 18 times [2022-11-22 02:53:57,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:53:57,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428278793] [2022-11-22 02:53:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:53:57,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:53:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:53:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:53:59,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:53:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428278793] [2022-11-22 02:53:59,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428278793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:53:59,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234833325] [2022-11-22 02:53:59,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:53:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:53:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:53:59,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:53:59,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:53:59,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:53:59,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:53:59,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-22 02:53:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:54:00,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:00,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2022-11-22 02:54:00,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 65 [2022-11-22 02:54:00,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-22 02:54:00,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 02:54:00,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:54:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:54:02,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:54:03,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:54:03,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 54 [2022-11-22 02:54:03,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 40 [2022-11-22 02:54:03,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:54:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-22 02:54:03,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:54:03,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2022-11-22 02:54:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:54:03,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234833325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:54:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1068874049] [2022-11-22 02:54:03,965 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:54:03,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:54:03,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:54:03,966 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:54:03,966 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:54:04,025 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:54:04,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:54:04,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-22 02:54:04,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:54:04,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-11-22 02:54:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:54:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:54:04,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:54:04,511 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:54:04,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 914 treesize of output 937 [2022-11-22 02:54:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:04,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:54:04,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 761 treesize of output 736 [2022-11-22 02:54:04,723 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:54:04,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 512 [2022-11-22 02:54:04,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:54:07,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:54:07,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 02:54:07,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:07,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 173 [2022-11-22 02:54:07,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:07,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2022-11-22 02:54:07,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 148 [2022-11-22 02:54:07,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:54:07,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 121 [2022-11-22 02:54:07,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:07,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:08,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:09,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:09,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:09,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:09,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:54:09,404 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:54:09,406 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:54:12,266 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21917#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:54:12,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:54:12,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:54:12,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 76 [2022-11-22 02:54:12,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327621422] [2022-11-22 02:54:12,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:54:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-22 02:54:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:54:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-22 02:54:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=7611, Unknown=0, NotChecked=0, Total=8010 [2022-11-22 02:54:12,269 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) [2022-11-22 02:55:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:55:20,847 INFO L93 Difference]: Finished difference Result 766 states and 883 transitions. [2022-11-22 02:55:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2022-11-22 02:55:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) Word has length 155 [2022-11-22 02:55:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:55:20,851 INFO L225 Difference]: With dead ends: 766 [2022-11-22 02:55:20,851 INFO L226 Difference]: Without dead ends: 764 [2022-11-22 02:55:20,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 926 GetRequests, 408 SyntacticMatches, 2 SemanticMatches, 516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105530 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=12728, Invalid=255078, Unknown=0, NotChecked=0, Total=267806 [2022-11-22 02:55:20,866 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 1413 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 11782 mSolverCounterSat, 2436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 14218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2436 IncrementalHoareTripleChecker+Valid, 11782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:55:20,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 1693 Invalid, 14218 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2436 Valid, 11782 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-11-22 02:55:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-11-22 02:55:20,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 122. [2022-11-22 02:55:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 02:55:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2022-11-22 02:55:20,980 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 155 [2022-11-22 02:55:20,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:55:20,980 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2022-11-22 02:55:20,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8815789473684212) internal successors, (219), 75 states have internal predecessors, (219), 24 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 25 states have call predecessors, (63), 24 states have call successors, (63) [2022-11-22 02:55:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2022-11-22 02:55:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-22 02:55:20,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:55:20,982 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-11-22 02:55:20,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:55:21,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:21,184 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:55:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:55:21,184 INFO L85 PathProgramCache]: Analyzing trace with hash -738725438, now seen corresponding path program 19 times [2022-11-22 02:55:21,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:55:21,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322280449] [2022-11-22 02:55:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:21,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:55:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 611 proven. 215 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:55:22,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:55:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322280449] [2022-11-22 02:55:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322280449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:55:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821949657] [2022-11-22 02:55:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 02:55:22,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:55:22,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:55:22,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:55:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:23,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:55:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:55:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 672 proven. 154 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:55:25,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:55:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 672 proven. 154 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-22 02:55:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821949657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:55:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [203441047] [2022-11-22 02:55:27,174 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-22 02:55:27,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:55:27,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:55:27,174 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:55:27,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:55:27,228 INFO L321 Elim1Store]: treesize reduction 42, result has 40.0 percent of original size [2022-11-22 02:55:27,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 46 [2022-11-22 02:55:27,283 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-22 02:55:27,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-22 02:55:27,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 202 [2022-11-22 02:55:27,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 120 [2022-11-22 02:55:27,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-22 02:55:27,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:55:27,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:55:27,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:55:27,765 INFO L321 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2022-11-22 02:55:27,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 11 case distinctions, treesize of input 835 treesize of output 858 [2022-11-22 02:55:27,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:55:27,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 664 treesize of output 651 [2022-11-22 02:55:28,077 INFO L321 Elim1Store]: treesize reduction 48, result has 18.6 percent of original size [2022-11-22 02:55:28,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 546 treesize of output 516 [2022-11-22 02:55:28,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:55:30,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:30,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:30,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 179 [2022-11-22 02:55:30,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-22 02:55:30,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2022-11-22 02:55:30,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 124 [2022-11-22 02:55:31,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:55:31,942 INFO L197 IcfgInterpreter]: Interpreting procedure ReadFromPort with input of size 15 for LOIs [2022-11-22 02:55:31,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:55:34,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25095#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= ~MAX~0 100000) (= |ULTIMATE.start_main_~DEFAULTVAL~0#1| 0) (<= 1 ~SIZE~0) (= 10 |ULTIMATE.start_main_~FIXEDVAL~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-22 02:55:34,467 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:55:34,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:55:34,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 32] total 95 [2022-11-22 02:55:34,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373187755] [2022-11-22 02:55:34,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:55:34,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-22 02:55:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:55:34,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-22 02:55:34,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2143, Invalid=9629, Unknown=0, NotChecked=0, Total=11772 [2022-11-22 02:55:34,470 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) [2022-11-22 02:55:35,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:55:35,854 INFO L93 Difference]: Finished difference Result 204 states and 232 transitions. [2022-11-22 02:55:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 02:55:35,855 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) Word has length 161 [2022-11-22 02:55:35,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:55:35,856 INFO L225 Difference]: With dead ends: 204 [2022-11-22 02:55:35,856 INFO L226 Difference]: Without dead ends: 135 [2022-11-22 02:55:35,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6236 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2550, Invalid=11730, Unknown=0, NotChecked=0, Total=14280 [2022-11-22 02:55:35,858 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 332 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:55:35,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 246 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:55:35,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-22 02:55:36,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2022-11-22 02:55:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-22 02:55:36,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2022-11-22 02:55:36,019 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 161 [2022-11-22 02:55:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:55:36,019 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2022-11-22 02:55:36,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.0526315789473686) internal successors, (290), 95 states have internal predecessors, (290), 21 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 21 states have call predecessors, (63), 21 states have call successors, (63) [2022-11-22 02:55:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2022-11-22 02:55:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-22 02:55:36,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:55:36,021 INFO L195 NwaCegarLoop]: trace histogram [24, 22, 21, 21, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2022-11-22 02:55:36,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:55:36,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:36,222 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:55:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:55:36,222 INFO L85 PathProgramCache]: Analyzing trace with hash 583758649, now seen corresponding path program 20 times [2022-11-22 02:55:36,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:55:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804500624] [2022-11-22 02:55:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:55:36,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:55:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:55:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-11-22 02:55:38,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:55:38,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804500624] [2022-11-22 02:55:38,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804500624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:55:38,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593462519] [2022-11-22 02:55:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:55:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:55:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:55:38,938 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:55:38,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07a9027c-c370-4a31-a5bd-f3f49108bff8/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process