./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW --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 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e --- 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-4e7fbc6 [2022-11-23 15:17:08,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:17:08,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:17:08,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:17:08,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:17:08,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:17:08,114 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:17:08,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:17:08,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:17:08,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:17:08,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:17:08,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:17:08,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:17:08,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:17:08,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:17:08,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:17:08,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:17:08,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:17:08,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:17:08,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:17:08,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:17:08,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:17:08,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:17:08,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:17:08,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:17:08,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:17:08,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:17:08,143 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:17:08,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:17:08,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:17:08,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:17:08,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:17:08,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:17:08,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:17:08,149 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:17:08,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:17:08,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:17:08,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:17:08,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:17:08,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:17:08,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:17:08,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:17:08,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:17:08,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:17:08,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:17:08,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:17:08,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:17:08,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:17:08,206 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:17:08,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:17:08,207 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:17:08,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:17:08,207 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:17:08,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:17:08,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:17:08,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:17:08,208 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:17:08,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:17:08,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:17:08,209 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:17:08,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:17:08,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:17:08,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:17:08,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:17:08,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:17:08,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:17:08,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:17:08,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:17:08,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:17:08,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:17:08,212 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:17:08,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:17:08,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:17:08,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:17:08,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:17:08,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:17:08,224 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:17:08,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:17:08,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:17:08,225 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:17:08,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:17:08,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:17:08,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:17:08,226 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_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e [2022-11-23 15:17:08,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:17:08,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:17:08,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:17:08,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:17:08,527 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:17:08,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/reducercommutativity/max.i [2022-11-23 15:17:11,697 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:17:11,899 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:17:11,900 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/sv-benchmarks/c/reducercommutativity/max.i [2022-11-23 15:17:11,906 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/data/39fec94a4/90019340ec0a4e9d98449ec13fe46f97/FLAG41605e876 [2022-11-23 15:17:11,927 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/data/39fec94a4/90019340ec0a4e9d98449ec13fe46f97 [2022-11-23 15:17:11,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:17:11,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:17:11,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:17:11,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:17:11,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:17:11,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:11" (1/1) ... [2022-11-23 15:17:11,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311ec21f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:11, skipping insertion in model container [2022-11-23 15:17:11,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:17:11" (1/1) ... [2022-11-23 15:17:11,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:17:11,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:17:12,136 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_ce1ad5aa-ec82-406f-8f42-c49b259078c7/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-23 15:17:12,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:17:12,149 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:17:12,168 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_ce1ad5aa-ec82-406f-8f42-c49b259078c7/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-23 15:17:12,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:17:12,181 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:17:12,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12 WrapperNode [2022-11-23 15:17:12,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:17:12,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:17:12,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:17:12,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:17:12,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,199 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,218 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-23 15:17:12,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:17:12,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:17:12,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:17:12,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:17:12,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:17:12,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:17:12,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:17:12,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:17:12,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (1/1) ... [2022-11-23 15:17:12,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:17:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:12,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:17:12,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:17:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:17:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-23 15:17:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-23 15:17:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:17:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:17:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:17:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:17:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:17:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:17:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:17:12,398 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:17:12,401 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:17:12,581 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:17:12,645 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:17:12,645 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:17:12,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:12 BoogieIcfgContainer [2022-11-23 15:17:12,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:17:12,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:17:12,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:17:12,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:17:12,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:17:11" (1/3) ... [2022-11-23 15:17:12,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593432a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:12, skipping insertion in model container [2022-11-23 15:17:12,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:17:12" (2/3) ... [2022-11-23 15:17:12,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@593432a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:17:12, skipping insertion in model container [2022-11-23 15:17:12,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:17:12" (3/3) ... [2022-11-23 15:17:12,662 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2022-11-23 15:17:12,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:17:12,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:17:12,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:17:12,751 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;@204ea430, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:17:12,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:17:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:17:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 15:17:12,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:12,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:12,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:12,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 150020737, now seen corresponding path program 1 times [2022-11-23 15:17:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:12,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781370910] [2022-11-23 15:17:12,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:12,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:17:13,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:13,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781370910] [2022-11-23 15:17:13,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781370910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:13,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039120700] [2022-11-23 15:17:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:13,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:13,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:13,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:17:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:13,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:17:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 15:17:13,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:17:13,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039120700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:13,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:17:13,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-23 15:17:13,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591382987] [2022-11-23 15:17:13,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:13,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:13,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:13,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:13,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:17:13,531 INFO L87 Difference]: Start difference. First operand has 18 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:17:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:13,611 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-23 15:17:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-11-23 15:17:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:13,623 INFO L225 Difference]: With dead ends: 36 [2022-11-23 15:17:13,624 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:17:13,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:17:13,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:13,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:17:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:17:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:17:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:17:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-23 15:17:13,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 20 [2022-11-23 15:17:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:13,676 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-23 15:17:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:17:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-23 15:17:13,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:17:13,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:13,678 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:13,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:13,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:17:13,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1246840564, now seen corresponding path program 1 times [2022-11-23 15:17:13,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:13,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959804469] [2022-11-23 15:17:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:17:14,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959804469] [2022-11-23 15:17:14,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959804469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:14,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:14,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:17:14,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289906405] [2022-11-23 15:17:14,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:14,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:17:14,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:17:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:14,122 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:17:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:14,159 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-23 15:17:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:17:14,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-23 15:17:14,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:14,161 INFO L225 Difference]: With dead ends: 26 [2022-11-23 15:17:14,161 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 15:17:14,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:17:14,163 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:14,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:17:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 15:17:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 15:17:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:17:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-23 15:17:14,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 23 [2022-11-23 15:17:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:14,173 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-23 15:17:14,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 15:17:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-23 15:17:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:17:14,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:14,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:14,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:17:14,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -455122768, now seen corresponding path program 1 times [2022-11-23 15:17:14,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:14,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144788509] [2022-11-23 15:17:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:14,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:17:14,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:14,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144788509] [2022-11-23 15:17:14,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144788509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433997183] [2022-11-23 15:17:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:14,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:14,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:14,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:17:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 15:17:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:17:14,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:17:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 15:17:14,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433997183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:17:14,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144574664] [2022-11-23 15:17:14,717 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-23 15:17:14,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:17:14,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:17:14,728 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:17:14,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:17:14,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:14,884 INFO L321 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2022-11-23 15:17:14,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-23 15:17:14,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:14,944 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 15:17:14,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-23 15:17:15,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:15,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:15,287 INFO L321 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2022-11-23 15:17:15,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 307 treesize of output 289 [2022-11-23 15:17:15,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 15:17:15,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:15,831 INFO L321 Elim1Store]: treesize reduction 45, result has 34.8 percent of original size [2022-11-23 15:17:15,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 83 [2022-11-23 15:17:15,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-11-23 15:17:15,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 15:17:16,126 INFO L197 IcfgInterpreter]: Interpreting procedure max with input of size 17 for LOIs [2022-11-23 15:17:16,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:17:18,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '373#(and (<= ~N~0 (+ |ULTIMATE.start_main_~i~1#1| 1)) (<= |ULTIMATE.start_main_~ret2~0#1| 2147483647) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#x~0#1.base|) (+ (* ~N~0 4) (- 4) |ULTIMATE.start_main_~#x~0#1.offset|)) |ULTIMATE.start_main_~temp~0#1|) (or (not (= |ULTIMATE.start_main_~ret2~0#1| |ULTIMATE.start_main_~ret~1#1|)) (not (= |ULTIMATE.start_main_~ret5~0#1| |ULTIMATE.start_main_~ret~1#1|))) (<= 1 ~N~0) (<= 0 (+ |ULTIMATE.start_main_~ret~1#1| 2147483648)) (<= |ULTIMATE.start_main_~ret~1#1| 2147483647) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~ret2~0#1| 2147483648)) (exists ((v_max_~ret~0_BEFORE_RETURN_6 Int)) (= |ULTIMATE.start_main_~ret5~0#1| (ite (<= (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647) (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) (+ (- 4294967296) (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296))))) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#x~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:17:18,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:17:18,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:17:18,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-23 15:17:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723622753] [2022-11-23 15:17:18,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:17:18,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 15:17:18,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:18,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 15:17:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:17:18,150 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:17:18,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:18,228 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-11-23 15:17:18,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:17:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 24 [2022-11-23 15:17:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:18,231 INFO L225 Difference]: With dead ends: 32 [2022-11-23 15:17:18,231 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 15:17:18,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:17:18,239 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:18,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:17:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 15:17:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 15:17:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 15:17:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-23 15:17:18,245 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 24 [2022-11-23 15:17:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:18,245 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-23 15:17:18,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:17:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-23 15:17:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 15:17:18,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:18,246 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:18,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:17:18,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce1ad5aa-ec82-406f-8f42-c49b259078c7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:18,448 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:18,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2007840381, now seen corresponding path program 2 times [2022-11-23 15:17:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508178213] [2022-11-23 15:17:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat