./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur --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 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c --- 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-38b53e6 [2022-11-25 22:24:26,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:24:26,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:24:26,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:24:26,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:24:26,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:24:26,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:24:26,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:24:26,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:24:26,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:24:26,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:24:26,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:24:26,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:24:26,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:24:26,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:24:26,190 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:24:26,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:24:26,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:24:26,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:24:26,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:24:26,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:24:26,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:24:26,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:24:26,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:24:26,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:24:26,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:24:26,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:24:26,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:24:26,212 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:24:26,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:24:26,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:24:26,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:24:26,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:24:26,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:24:26,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:24:26,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:24:26,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:24:26,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:24:26,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:24:26,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:24:26,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:24:26,221 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:24:26,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:24:26,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:24:26,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:24:26,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:24:26,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:24:26,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:24:26,264 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:24:26,264 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:24:26,264 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:24:26,265 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:24:26,266 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:24:26,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:24:26,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:24:26,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:24:26,266 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:24:26,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:24:26,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:24:26,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:24:26,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:24:26,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:24:26,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:24:26,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:24:26,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:24:26,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:24:26,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:24:26,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:24:26,269 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:24:26,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:24:26,270 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:24:26,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:24:26,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:24:26,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:24:26,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:24:26,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:24:26,271 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:24:26,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:24:26,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:24:26,271 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:24:26,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:24:26,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:24:26,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:24:26,272 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_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c [2022-11-25 22:24:26,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:24:26,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:24:26,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:24:26,585 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:24:26,586 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:24:26,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2022-11-25 22:24:29,698 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:24:29,962 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:24:29,962 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2022-11-25 22:24:29,969 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/data/a0fe01ddb/c81272df2fa74f11bc5b2c43ba77e3ed/FLAG1d83df26b [2022-11-25 22:24:29,988 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/data/a0fe01ddb/c81272df2fa74f11bc5b2c43ba77e3ed [2022-11-25 22:24:29,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:24:29,993 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:24:29,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:24:29,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:24:29,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:24:30,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:24:29" (1/1) ... [2022-11-25 22:24:30,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e0b343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30, skipping insertion in model container [2022-11-25 22:24:30,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:24:29" (1/1) ... [2022-11-25 22:24:30,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:24:30,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:24:30,170 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_c8536676-335e-4383-b47f-899e814a7634/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2022-11-25 22:24:30,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:24:30,195 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:24:30,206 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_c8536676-335e-4383-b47f-899e814a7634/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2022-11-25 22:24:30,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:24:30,225 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:24:30,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30 WrapperNode [2022-11-25 22:24:30,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:24:30,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:24:30,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:24:30,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:24:30,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,263 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 22:24:30,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:24:30,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:24:30,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:24:30,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:24:30,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:24:30,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:24:30,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:24:30,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:24:30,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (1/1) ... [2022-11-25 22:24:30,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:24:30,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:30,340 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:24:30,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:24:30,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:24:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:24:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:24:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:24:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:24:30,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:24:30,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:24:30,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:24:30,486 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:24:30,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:24:30,734 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:24:30,773 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:24:30,773 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 22:24:30,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:24:30 BoogieIcfgContainer [2022-11-25 22:24:30,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:24:30,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:24:30,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:24:30,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:24:30,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:24:29" (1/3) ... [2022-11-25 22:24:30,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126a939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:24:30, skipping insertion in model container [2022-11-25 22:24:30,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:24:30" (2/3) ... [2022-11-25 22:24:30,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126a939e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:24:30, skipping insertion in model container [2022-11-25 22:24:30,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:24:30" (3/3) ... [2022-11-25 22:24:30,787 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2022-11-25 22:24:30,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:24:30,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:24:30,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:24:30,928 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;@3379e1b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:24:30,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:24:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 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) [2022-11-25 22:24:30,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:24:30,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:30,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:30,945 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:30,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1393574035, now seen corresponding path program 1 times [2022-11-25 22:24:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:30,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447993021] [2022-11-25 22:24:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:30,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:24:31,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447993021] [2022-11-25 22:24:31,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447993021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:31,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:24:31,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:24:31,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280037313] [2022-11-25 22:24:31,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:31,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:24:31,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:24:31,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:24:31,298 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-11-25 22:24:31,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:31,377 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-11-25 22:24:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:24:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2022-11-25 22:24:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:31,390 INFO L225 Difference]: With dead ends: 19 [2022-11-25 22:24:31,390 INFO L226 Difference]: Without dead ends: 10 [2022-11-25 22:24:31,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:24:31,398 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:31,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-25 22:24:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-25 22:24:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-25 22:24:31,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2022-11-25 22:24:31,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:31,442 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-25 22:24:31,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-11-25 22:24:31,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-25 22:24:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:24:31,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:31,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:24:31,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1180687681, now seen corresponding path program 1 times [2022-11-25 22:24:31,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169811586] [2022-11-25 22:24:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:31,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:24:31,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:31,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169811586] [2022-11-25 22:24:31,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169811586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:31,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398059962] [2022-11-25 22:24:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:31,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:31,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:31,616 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:31,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:24:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 22:24:31,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 22:24:31,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:24:31,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398059962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:24:31,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 22:24:31,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 22:24:31,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331048059] [2022-11-25 22:24:31,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:24:31,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:24:31,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:24:31,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:24:31,726 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-25 22:24:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:31,749 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2022-11-25 22:24:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:24:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-25 22:24:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:31,751 INFO L225 Difference]: With dead ends: 18 [2022-11-25 22:24:31,751 INFO L226 Difference]: Without dead ends: 12 [2022-11-25 22:24:31,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:24:31,753 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:31,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:24:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-25 22:24:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-25 22:24:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-11-25 22:24:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-25 22:24:31,758 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-25 22:24:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:31,758 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-25 22:24:31,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-25 22:24:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-25 22:24:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:24:31,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:31,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:31,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:31,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:31,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:31,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:31,967 INFO L85 PathProgramCache]: Analyzing trace with hash -438207443, now seen corresponding path program 1 times [2022-11-25 22:24:31,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:31,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314729372] [2022-11-25 22:24:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:31,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:24:32,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314729372] [2022-11-25 22:24:32,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314729372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:32,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485862585] [2022-11-25 22:24:32,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:32,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:32,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:32,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:32,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:24:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:24:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:24:32,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:24:32,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485862585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1585971124] [2022-11-25 22:24:32,368 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:32,368 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:32,374 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:32,381 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:32,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,601 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:32,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:24:32,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:33,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,212 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:33,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:24:33,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,792 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:33,793 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:33,829 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:33,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:33,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:33,922 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:33,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:33,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:34,015 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:34,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:34,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:34,046 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:34,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:34,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:34,101 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:24:34,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:24:34,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:34,152 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:34,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:34,178 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:34,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:34,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:34,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:34,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 22:24:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986713254] [2022-11-25 22:24:34,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:24:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:34,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:24:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:24:34,400 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-25 22:24:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:34,468 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2022-11-25 22:24:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:24:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 22:24:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:34,469 INFO L225 Difference]: With dead ends: 24 [2022-11-25 22:24:34,470 INFO L226 Difference]: Without dead ends: 15 [2022-11-25 22:24:34,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:24:34,471 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-25 22:24:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-25 22:24:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-25 22:24:34,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2022-11-25 22:24:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:34,476 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-25 22:24:34,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-25 22:24:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-25 22:24:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:24:34,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:34,478 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:34,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:34,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1554192473, now seen corresponding path program 2 times [2022-11-25 22:24:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:34,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22944616] [2022-11-25 22:24:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:24:34,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22944616] [2022-11-25 22:24:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22944616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662704865] [2022-11-25 22:24:34,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:24:34,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:34,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:34,863 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:34,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:24:34,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 22:24:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:24:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:24:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 22:24:34,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662704865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:34,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208464439] [2022-11-25 22:24:34,978 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:34,978 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:34,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:34,978 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:34,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:35,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,084 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:35,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:24:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:24:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,308 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:24:35,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-11-25 22:24:35,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,429 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:35,429 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:35,460 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:35,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:35,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,536 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:24:35,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:24:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,601 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:35,602 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:35,627 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:35,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:35,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,706 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:35,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:35,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:35,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:35,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:35,800 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:35,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:35,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:35,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:35,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 22:24:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154639809] [2022-11-25 22:24:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:24:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:24:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:24:35,992 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-25 22:24:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:36,044 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-11-25 22:24:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:24:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 22:24:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:36,045 INFO L225 Difference]: With dead ends: 28 [2022-11-25 22:24:36,045 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 22:24:36,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 22:24:36,047 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:36,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:24:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 22:24:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 22:24:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-25 22:24:36,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2022-11-25 22:24:36,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:36,052 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-25 22:24:36,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-25 22:24:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-25 22:24:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 22:24:36,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:36,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:36,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 22:24:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:36,260 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 208615917, now seen corresponding path program 3 times [2022-11-25 22:24:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094337151] [2022-11-25 22:24:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:36,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:36,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094337151] [2022-11-25 22:24:36,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094337151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:36,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709470573] [2022-11-25 22:24:36,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:24:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:36,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:36,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:24:36,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:24:36,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:24:36,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:36,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:36,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709470573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098558236] [2022-11-25 22:24:36,714 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:36,715 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:36,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:36,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:36,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,808 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:36,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:24:36,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:36,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:37,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:37,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,084 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:24:37,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,491 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:37,491 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:37,520 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:37,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,616 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:24:37,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:24:37,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,677 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:37,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:37,700 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:37,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,771 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:24:37,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:24:37,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:37,831 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:37,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:37,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:38,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '549#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:38,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:38,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:38,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 22:24:38,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913949877] [2022-11-25 22:24:38,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:38,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:24:38,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:38,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:24:38,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:24:38,057 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:38,098 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-25 22:24:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 22:24:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-25 22:24:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:38,099 INFO L225 Difference]: With dead ends: 42 [2022-11-25 22:24:38,099 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 22:24:38,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:24:38,101 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:38,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:24:38,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 22:24:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-25 22:24:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-25 22:24:38,109 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-11-25 22:24:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-25 22:24:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-25 22:24:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:24:38,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:38,110 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:38,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:38,311 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:38,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1877390995, now seen corresponding path program 4 times [2022-11-25 22:24:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449777430] [2022-11-25 22:24:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:38,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:38,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449777430] [2022-11-25 22:24:38,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449777430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:38,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210182614] [2022-11-25 22:24:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:24:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:38,662 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:38,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:24:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:38,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:24:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:38,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:39,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210182614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:39,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259778226] [2022-11-25 22:24:39,046 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:39,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:39,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:39,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:39,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:39,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,126 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 22:24:39,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 22:24:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,221 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:39,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:39,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,473 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:39,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:24:39,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,854 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:39,854 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:39,880 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:39,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:39,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:39,955 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:39,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:40,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:40,019 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:40,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:40,047 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:40,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:40,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:40,130 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:24:40,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:24:40,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:40,205 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:40,206 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 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:40,220 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:40,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:40,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:40,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:40,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 22:24:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999814447] [2022-11-25 22:24:40,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:24:40,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:24:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 22:24:40,426 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:40,495 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2022-11-25 22:24:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 22:24:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-25 22:24:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:40,496 INFO L225 Difference]: With dead ends: 54 [2022-11-25 22:24:40,496 INFO L226 Difference]: Without dead ends: 39 [2022-11-25 22:24:40,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-25 22:24:40,497 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:40,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-25 22:24:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-25 22:24:40,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-25 22:24:40,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-11-25 22:24:40,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:40,504 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-25 22:24:40,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:40,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-25 22:24:40,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 22:24:40,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:40,505 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:40,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:40,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:40,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:40,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:40,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1617463405, now seen corresponding path program 5 times [2022-11-25 22:24:40,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:40,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227785353] [2022-11-25 22:24:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:40,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 22:24:41,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227785353] [2022-11-25 22:24:41,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227785353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:41,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438204039] [2022-11-25 22:24:41,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:24:41,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:41,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:41,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:41,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:24:41,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:24:41,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:41,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:24:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-25 22:24:41,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2022-11-25 22:24:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438204039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1943046147] [2022-11-25 22:24:41,972 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:41,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:41,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:41,973 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:41,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:41,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,069 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:42,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:24:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:42,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:42,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,301 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:42,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:24:42,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,696 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:42,696 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:42,727 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:42,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,803 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:42,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:42,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:42,884 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:42,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:42,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:42,957 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:42,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:43,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:43,014 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:43,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:43,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:43,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:43,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:43,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:43,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-25 22:24:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519844352] [2022-11-25 22:24:43,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:43,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 22:24:43,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:43,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 22:24:43,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:24:43,299 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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) [2022-11-25 22:24:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:43,427 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-11-25 22:24:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 22:24:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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 37 [2022-11-25 22:24:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:43,429 INFO L225 Difference]: With dead ends: 67 [2022-11-25 22:24:43,429 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 22:24:43,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 22:24:43,431 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:43,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 22:24:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-25 22:24:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:24:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-25 22:24:43,437 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2022-11-25 22:24:43,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:43,438 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-25 22:24:43,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 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) [2022-11-25 22:24:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-25 22:24:43,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 22:24:43,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:43,440 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:43,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:43,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:43,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:43,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1526016639, now seen corresponding path program 6 times [2022-11-25 22:24:43,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:43,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662631889] [2022-11-25 22:24:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:43,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:44,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662631889] [2022-11-25 22:24:44,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662631889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:44,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756738146] [2022-11-25 22:24:44,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:24:44,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:44,679 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:44,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:24:44,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:24:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:24:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 22:24:44,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:44,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:45,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756738146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018899584] [2022-11-25 22:24:45,764 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:45,764 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:45,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:45,765 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:45,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:45,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,834 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 22:24:45,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 22:24:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,923 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:45,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:45,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:45,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:24:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,084 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:24:46,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-11-25 22:24:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,185 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:46,186 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:46,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:46,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:46,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,249 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:24:46,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:24:46,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,289 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:46,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:46,327 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:24:46,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:24:46,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,394 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:24:46,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:24:46,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:46,462 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:46,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:46,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:47,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1849#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:47,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:47,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:47,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-25 22:24:47,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944541353] [2022-11-25 22:24:47,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:47,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 22:24:47,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 22:24:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 22:24:47,033 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-11-25 22:24:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:47,140 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2022-11-25 22:24:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 22:24:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-25 22:24:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:47,145 INFO L225 Difference]: With dead ends: 104 [2022-11-25 22:24:47,146 INFO L226 Difference]: Without dead ends: 77 [2022-11-25 22:24:47,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-25 22:24:47,148 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:47,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-25 22:24:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-25 22:24:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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) [2022-11-25 22:24:47,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-11-25 22:24:47,171 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2022-11-25 22:24:47,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:47,171 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-11-25 22:24:47,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-11-25 22:24:47,172 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-11-25 22:24:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 22:24:47,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:47,178 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:47,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:47,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:24:47,385 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash 32004397, now seen corresponding path program 7 times [2022-11-25 22:24:47,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:47,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103705995] [2022-11-25 22:24:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:47,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:50,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:24:50,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103705995] [2022-11-25 22:24:50,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103705995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:24:50,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958349736] [2022-11-25 22:24:50,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:24:50,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:24:50,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:24:50,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:24:50,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:24:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:24:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 22:24:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:24:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:50,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:24:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:24:53,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958349736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:24:53,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614771744] [2022-11-25 22:24:53,897 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:24:53,897 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:24:53,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:24:53,897 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:24:53,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:24:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:53,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:53,984 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:24:53,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:24:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:24:54,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:24:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,210 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:24:54,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:24:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,600 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:24:54,601 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:24:54,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,633 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:54,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:54,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:24:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,673 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:24:54,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:24:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,716 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:54,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:54,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,756 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:54,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:54,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,794 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:24:54,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:24:54,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:24:54,836 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:24:54,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:24:54,852 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:24:55,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2747#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:24:55,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:24:55,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:24:55,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-25 22:24:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589001036] [2022-11-25 22:24:55,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:24:55,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-25 22:24:55,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:24:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-25 22:24:55,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:24:55,677 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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) [2022-11-25 22:24:55,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:24:55,952 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2022-11-25 22:24:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-25 22:24:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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 75 [2022-11-25 22:24:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:24:55,954 INFO L225 Difference]: With dead ends: 154 [2022-11-25 22:24:55,954 INFO L226 Difference]: Without dead ends: 127 [2022-11-25 22:24:55,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-25 22:24:55,957 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:24:55,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:24:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-25 22:24:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-25 22:24:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 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) [2022-11-25 22:24:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-11-25 22:24:55,976 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2022-11-25 22:24:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:24:55,976 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-11-25 22:24:55,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 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) [2022-11-25 22:24:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-11-25 22:24:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 22:24:55,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:24:55,983 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:24:55,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:24:56,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 22:24:56,191 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:24:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:24:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -125382739, now seen corresponding path program 8 times [2022-11-25 22:24:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:24:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78826136] [2022-11-25 22:24:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:24:56,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:24:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-25 22:25:04,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78826136] [2022-11-25 22:25:04,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78826136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:04,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896456706] [2022-11-25 22:25:04,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:25:04,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:04,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:04,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:04,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:25:07,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 22:25:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:25:07,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-25 22:25:07,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2022-11-25 22:25:08,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896456706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:08,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526220117] [2022-11-25 22:25:08,462 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:25:08,462 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:08,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:08,463 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:08,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,533 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 22:25:08,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 22:25:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,613 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:25:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:25:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:25:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,757 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:25:08,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-11-25 22:25:08,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,840 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:08,840 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:08,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,865 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:25:08,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:25:08,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,899 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:25:08,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:25:08,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,946 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:25:08,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:25:08,976 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:25:08,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:25:08,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:09,056 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:25:09,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:25:09,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:09,106 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:25:09,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:25:09,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:10,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4167#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:10,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:10,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:10,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-11-25 22:25:10,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137488542] [2022-11-25 22:25:10,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:10,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-25 22:25:10,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-25 22:25:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 22:25:10,619 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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) [2022-11-25 22:25:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:10,932 INFO L93 Difference]: Finished difference Result 179 states and 209 transitions. [2022-11-25 22:25:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-25 22:25:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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 125 [2022-11-25 22:25:10,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:10,936 INFO L225 Difference]: With dead ends: 179 [2022-11-25 22:25:10,936 INFO L226 Difference]: Without dead ends: 152 [2022-11-25 22:25:10,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 336 SyntacticMatches, 11 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4220 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-11-25 22:25:10,945 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:10,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:25:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-25 22:25:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-25 22:25:10,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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) [2022-11-25 22:25:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-11-25 22:25:10,962 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 125 [2022-11-25 22:25:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:10,963 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-11-25 22:25:10,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.0975609756097562) internal successors, (135), 123 states have internal predecessors, (135), 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) [2022-11-25 22:25:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-11-25 22:25:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-25 22:25:10,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:10,965 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:10,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:11,166 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash 288512769, now seen corresponding path program 9 times [2022-11-25 22:25:11,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:11,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604064710] [2022-11-25 22:25:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:25:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:25:18,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:25:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604064710] [2022-11-25 22:25:18,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604064710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:25:18,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865830659] [2022-11-25 22:25:18,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:25:18,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:25:18,895 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:25:18,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 22:25:19,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:25:19,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:25:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 22:25:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:25:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:25:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:25:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5456 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:25:32,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865830659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:25:32,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625492858] [2022-11-25 22:25:32,101 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:25:32,101 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:25:32,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:25:32,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:25:32,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:25:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,175 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 22:25:32,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 22:25:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,255 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:25:32,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:25:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:25:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:25:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,473 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:25:32,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-11-25 22:25:32,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,554 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:25:32,555 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:25:32,579 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:25:32,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:25:32,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,659 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:25:32,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:25:32,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,732 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:25:32,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:25:32,753 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:25:32,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:25:32,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,821 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:25:32,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:25:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:25:32,881 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:25:32,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:25:32,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:25:35,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5917#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:25:35,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:25:35,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:25:35,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-25 22:25:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236496091] [2022-11-25 22:25:35,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:25:35,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-25 22:25:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:25:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-25 22:25:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 22:25:35,795 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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) [2022-11-25 22:25:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:25:36,253 INFO L93 Difference]: Finished difference Result 304 states and 410 transitions. [2022-11-25 22:25:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-25 22:25:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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 150 [2022-11-25 22:25:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:25:36,256 INFO L225 Difference]: With dead ends: 304 [2022-11-25 22:25:36,256 INFO L226 Difference]: Without dead ends: 253 [2022-11-25 22:25:36,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 320 SyntacticMatches, 23 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8796 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-25 22:25:36,260 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:25:36,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:25:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-25 22:25:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-11-25 22:25:36,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0158730158730158) internal successors, (256), 252 states have internal predecessors, (256), 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) [2022-11-25 22:25:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 256 transitions. [2022-11-25 22:25:36,273 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 256 transitions. Word has length 150 [2022-11-25 22:25:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:25:36,274 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 256 transitions. [2022-11-25 22:25:36,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0394088669950738) internal successors, (211), 202 states have internal predecessors, (211), 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) [2022-11-25 22:25:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 256 transitions. [2022-11-25 22:25:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-25 22:25:36,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:25:36,278 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:25:36,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 22:25:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:25:36,487 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:25:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:25:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1779984301, now seen corresponding path program 10 times [2022-11-25 22:25:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:25:36,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265951842] [2022-11-25 22:25:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:25:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:25:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:26:05,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:26:05,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265951842] [2022-11-25 22:26:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265951842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:26:05,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4012623] [2022-11-25 22:26:05,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:26:05,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:26:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:26:05,119 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:26:05,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 22:26:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:26:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 3790 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-25 22:26:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:26:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:26:06,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:26:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20606 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:26:56,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4012623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:26:56,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754038474] [2022-11-25 22:26:56,183 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:26:56,183 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:26:56,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:26:56,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:26:56,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:26:56,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,275 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:26:56,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:26:56,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:26:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:26:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:26:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,468 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:26:56,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:26:56,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,750 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:26:56,750 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:26:56,777 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:26:56,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:26:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,843 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:26:56,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:26:56,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,911 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:26:56,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:26:56,935 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:26:56,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:26:56,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:56,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:57,002 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:26:57,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:26:57,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:26:57,087 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:26:57,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:26:57,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:26:58,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8927#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:26:58,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:26:58,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:26:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-25 22:26:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248123502] [2022-11-25 22:26:58,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:26:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-25 22:26:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:26:58,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-25 22:26:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 22:26:58,084 INFO L87 Difference]: Start difference. First operand 253 states and 256 transitions. Second operand has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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) [2022-11-25 22:27:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:27:00,903 INFO L93 Difference]: Finished difference Result 506 states and 713 transitions. [2022-11-25 22:27:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-25 22:27:00,905 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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 251 [2022-11-25 22:27:00,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:27:00,907 INFO L225 Difference]: With dead ends: 506 [2022-11-25 22:27:00,907 INFO L226 Difference]: Without dead ends: 455 [2022-11-25 22:27:00,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-25 22:27:00,918 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:27:00,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:27:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-25 22:27:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 455. [2022-11-25 22:27:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 1.0088105726872247) internal successors, (458), 454 states have internal predecessors, (458), 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) [2022-11-25 22:27:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 458 transitions. [2022-11-25 22:27:00,941 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 458 transitions. Word has length 251 [2022-11-25 22:27:00,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:27:00,941 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 458 transitions. [2022-11-25 22:27:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.019753086419753) internal successors, (413), 404 states have internal predecessors, (413), 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) [2022-11-25 22:27:00,943 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 458 transitions. [2022-11-25 22:27:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-11-25 22:27:00,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:27:00,952 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:27:00,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 22:27:01,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 22:27:01,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:27:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:27:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -380666835, now seen corresponding path program 11 times [2022-11-25 22:27:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:27:01,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818198749] [2022-11-25 22:27:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:27:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:27:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:29:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-11-25 22:29:00,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:29:00,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818198749] [2022-11-25 22:29:00,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818198749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:29:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406208943] [2022-11-25 22:29:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:29:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:29:00,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:29:00,855 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:29:00,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 22:30:53,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-25 22:30:53,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:30:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 22:30:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:30:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 424 proven. 253 refuted. 0 times theorem prover too weak. 80832 trivial. 0 not checked. [2022-11-25 22:30:58,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:31:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 81509 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81256 trivial. 0 not checked. [2022-11-25 22:31:03,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406208943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:31:03,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550088700] [2022-11-25 22:31:03,496 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:31:03,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:31:03,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:31:03,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:31:03,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:31:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,581 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:31:03,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:31:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-25 22:31:03,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-25 22:31:03,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:03,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:31:03,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:03,752 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-25 22:31:03,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2022-11-25 22:31:03,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:03,839 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:31:03,840 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:31:03,868 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:31:03,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:31:03,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:03,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:03,945 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:31:03,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:31:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:04,001 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:31:04,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:31:04,022 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:31:04,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:31:04,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:04,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:04,084 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-25 22:31:04,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-25 22:31:04,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:31:04,143 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:31:04,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:31:04,156 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:31:05,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14005#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:31:05,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:31:05,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:31:05,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 27, 25] total 453 [2022-11-25 22:31:05,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264664315] [2022-11-25 22:31:05,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:31:05,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 453 states [2022-11-25 22:31:05,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:31:05,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 453 interpolants. [2022-11-25 22:31:05,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83411, Invalid=125895, Unknown=0, NotChecked=0, Total=209306 [2022-11-25 22:31:05,984 INFO L87 Difference]: Start difference. First operand 455 states and 458 transitions. Second operand has 453 states, 453 states have (on average 1.0286975717439293) internal successors, (466), 453 states have internal predecessors, (466), 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) [2022-11-25 22:31:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:31:18,638 INFO L93 Difference]: Finished difference Result 555 states and 609 transitions. [2022-11-25 22:31:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 454 states. [2022-11-25 22:31:18,639 INFO L78 Accepts]: Start accepts. Automaton has has 453 states, 453 states have (on average 1.0286975717439293) internal successors, (466), 453 states have internal predecessors, (466), 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 453 [2022-11-25 22:31:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:31:18,643 INFO L225 Difference]: With dead ends: 555 [2022-11-25 22:31:18,643 INFO L226 Difference]: Without dead ends: 504 [2022-11-25 22:31:18,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1856 GetRequests, 1352 SyntacticMatches, 0 SemanticMatches, 504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22978 ImplicationChecksByTransitivity, 89.1s TimeCoverageRelationStatistics Valid=85812, Invalid=169718, Unknown=0, NotChecked=0, Total=255530 [2022-11-25 22:31:18,658 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:31:18,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 24 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:31:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-25 22:31:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-11-25 22:31:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0079522862823063) internal successors, (507), 503 states have internal predecessors, (507), 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) [2022-11-25 22:31:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 507 transitions. [2022-11-25 22:31:18,686 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 507 transitions. Word has length 453 [2022-11-25 22:31:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:31:18,687 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 507 transitions. [2022-11-25 22:31:18,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 453 states, 453 states have (on average 1.0286975717439293) internal successors, (466), 453 states have internal predecessors, (466), 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) [2022-11-25 22:31:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 507 transitions. [2022-11-25 22:31:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-25 22:31:18,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:31:18,700 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:31:18,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:31:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 22:31:18,901 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:31:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:31:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 644548609, now seen corresponding path program 12 times [2022-11-25 22:31:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:31:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792374548] [2022-11-25 22:31:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:31:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:31:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:33:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-25 22:33:25,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:33:25,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792374548] [2022-11-25 22:33:25,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792374548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:33:25,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823485543] [2022-11-25 22:33:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:33:25,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:33:25,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:33:25,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:33:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 22:33:28,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:33:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:33:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 7577 conjuncts, 405 conjunts are in the unsatisfiable core [2022-11-25 22:33:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:33:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-25 22:33:29,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 83568 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-11-25 22:36:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823485543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:57,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877263004] [2022-11-25 22:36:57,066 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-25 22:36:57,066 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:57,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:57,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:57,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:57,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,131 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-25 22:36:57,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-25 22:36:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,207 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-25 22:36:57,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-25 22:36:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-25 22:36:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,372 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-25 22:36:57,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 348 treesize of output 338 [2022-11-25 22:36:57,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,660 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-25 22:36:57,661 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-25 22:36:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,686 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:36:57,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:36:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:36:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,722 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-25 22:36:57,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 91 [2022-11-25 22:36:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,760 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:36:57,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:36:57,793 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 22:36:57,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-25 22:36:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,860 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-25 22:36:57,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-25 22:36:57,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:36:57,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 22:36:57,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-25 22:36:57,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:37:12,534 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20074#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:37:12,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:37:12,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:37:12,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-11-25 22:37:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657680699] [2022-11-25 22:37:12,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:37:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-11-25 22:37:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:37:12,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-11-25 22:37:12,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-25 22:37:12,629 INFO L87 Difference]: Start difference. First operand 504 states and 507 transitions. Second operand has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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) [2022-11-25 22:37:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:37:27,869 INFO L93 Difference]: Finished difference Result 1008 states and 1418 transitions. [2022-11-25 22:37:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-11-25 22:37:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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 502 [2022-11-25 22:37:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:37:27,875 INFO L225 Difference]: With dead ends: 1008 [2022-11-25 22:37:27,875 INFO L226 Difference]: Without dead ends: 909 [2022-11-25 22:37:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1909 GetRequests, 1048 SyntacticMatches, 47 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64636 ImplicationChecksByTransitivity, 288.4s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-11-25 22:37:27,904 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:37:27,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:37:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-25 22:37:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 909. [2022-11-25 22:37:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.0044052863436124) internal successors, (912), 908 states have internal predecessors, (912), 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) [2022-11-25 22:37:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 912 transitions. [2022-11-25 22:37:27,948 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 912 transitions. Word has length 502 [2022-11-25 22:37:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:37:27,949 INFO L495 AbstractCegarLoop]: Abstraction has 909 states and 912 transitions. [2022-11-25 22:37:27,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0098643649815042) internal successors, (819), 810 states have internal predecessors, (819), 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) [2022-11-25 22:37:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 912 transitions. [2022-11-25 22:37:27,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-11-25 22:37:27,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:37:27,959 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:37:27,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:37:28,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8536676-335e-4383-b47f-899e814a7634/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:37:28,175 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:37:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:37:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash -759775059, now seen corresponding path program 13 times [2022-11-25 22:37:28,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:37:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686318234] [2022-11-25 22:37:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:37:28,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:37:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat