./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 385b06dfd41f8b2cf291934cb4635d07bfe2a63001fa162165126d7b890c1d72 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:16:17,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:16:17,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:16:17,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:16:17,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:16:17,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:16:17,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:16:17,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:16:17,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:16:17,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:16:17,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:16:17,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:16:17,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:16:17,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:16:17,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:16:17,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:16:17,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:16:17,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:16:17,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:16:17,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:16:17,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:16:17,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:16:17,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:16:17,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:16:17,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:16:17,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:16:17,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:16:17,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:16:17,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:16:17,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:16:17,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:16:17,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:16:17,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:16:17,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:16:17,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:16:17,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:16:17,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:16:17,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:16:17,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:16:17,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:16:17,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:16:17,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 00:16:17,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:16:17,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:16:17,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:16:17,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:16:17,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:16:17,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:16:17,202 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:16:17,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:16:17,203 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:16:17,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:16:17,203 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:16:17,203 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:16:17,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:16:17,204 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:16:17,204 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:16:17,204 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:16:17,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:16:17,205 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:16:17,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:16:17,206 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:16:17,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:16:17,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:16:17,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:16:17,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:16:17,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:16:17,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:16:17,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:16:17,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:16:17,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:16:17,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:16:17,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:16:17,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:16:17,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:17,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:16:17,210 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:16:17,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:16:17,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:16:17,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:16:17,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:16:17,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:16:17,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:16:17,211 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_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 385b06dfd41f8b2cf291934cb4635d07bfe2a63001fa162165126d7b890c1d72 [2022-11-22 00:16:17,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:16:17,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:16:17,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:16:17,509 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:16:17,510 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:16:17,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-multidimensional/init-3-u.c [2022-11-22 00:16:20,639 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:16:20,846 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:16:20,847 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/sv-benchmarks/c/array-multidimensional/init-3-u.c [2022-11-22 00:16:20,853 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/data/c729451f5/f016722dc77241258c8ed05f1a43f9cb/FLAG62fc6f626 [2022-11-22 00:16:20,869 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/data/c729451f5/f016722dc77241258c8ed05f1a43f9cb [2022-11-22 00:16:20,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:16:20,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:16:20,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:20,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:16:20,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:16:20,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:20" (1/1) ... [2022-11-22 00:16:20,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8b9945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:20, skipping insertion in model container [2022-11-22 00:16:20,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:20" (1/1) ... [2022-11-22 00:16:20,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:16:20,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:16:21,043 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_1c863006-3903-4e3e-9555-92ecb780f8bd/sv-benchmarks/c/array-multidimensional/init-3-u.c[320,333] [2022-11-22 00:16:21,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:21,070 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:16:21,080 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_1c863006-3903-4e3e-9555-92ecb780f8bd/sv-benchmarks/c/array-multidimensional/init-3-u.c[320,333] [2022-11-22 00:16:21,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:21,101 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:16:21,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21 WrapperNode [2022-11-22 00:16:21,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:21,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:21,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:16:21,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:16:21,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,136 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2022-11-22 00:16:21,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:21,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:16:21,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:16:21,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:16:21,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:16:21,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:16:21,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:16:21,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:16:21,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (1/1) ... [2022-11-22 00:16:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:21,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:21,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:16:21,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:16:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:16:21,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:16:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 00:16:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:16:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:16:21,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:16:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:16:21,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:16:21,302 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:16:21,304 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:16:21,485 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:16:21,536 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:16:21,536 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 00:16:21,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:21 BoogieIcfgContainer [2022-11-22 00:16:21,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:16:21,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:16:21,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:16:21,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:16:21,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:16:20" (1/3) ... [2022-11-22 00:16:21,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a474d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:21, skipping insertion in model container [2022-11-22 00:16:21,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:21" (2/3) ... [2022-11-22 00:16:21,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a474d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:21, skipping insertion in model container [2022-11-22 00:16:21,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:21" (3/3) ... [2022-11-22 00:16:21,576 INFO L112 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2022-11-22 00:16:21,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:16:21,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 00:16:21,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:16:21,681 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;@648bd3a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:16:21,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 00:16:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) [2022-11-22 00:16:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:16:21,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:21,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:21,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:21,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:21,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1256365896, now seen corresponding path program 1 times [2022-11-22 00:16:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:21,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806769044] [2022-11-22 00:16:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:21,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:21,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:21,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253062576] [2022-11-22 00:16:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:21,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:21,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:21,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:16:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:21,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:16:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:21,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:16:21,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806769044] [2022-11-22 00:16:21,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:21,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253062576] [2022-11-22 00:16:21,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253062576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:21,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:21,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:16:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196579391] [2022-11-22 00:16:21,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:21,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:22,023 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 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) 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) [2022-11-22 00:16:22,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:22,078 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2022-11-22 00:16:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:22,081 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 [2022-11-22 00:16:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:22,094 INFO L225 Difference]: With dead ends: 23 [2022-11-22 00:16:22,094 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 00:16:22,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:22,105 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:22,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 00:16:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2022-11-22 00:16:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2022-11-22 00:16:22,133 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 17 transitions. Word has length 7 [2022-11-22 00:16:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:22,134 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 17 transitions. [2022-11-22 00:16:22,134 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) [2022-11-22 00:16:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 17 transitions. [2022-11-22 00:16:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 00:16:22,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:22,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:22,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:22,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-22 00:16:22,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:22,342 INFO L85 PathProgramCache]: Analyzing trace with hash 945982200, now seen corresponding path program 1 times [2022-11-22 00:16:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:22,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307216867] [2022-11-22 00:16:22,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:22,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:22,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451328052] [2022-11-22 00:16:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:22,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:22,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:16:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:22,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:16:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:22,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:16:22,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307216867] [2022-11-22 00:16:22,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:22,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451328052] [2022-11-22 00:16:22,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451328052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:22,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:22,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742812536] [2022-11-22 00:16:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:16:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:16:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:22,525 INFO L87 Difference]: Start difference. First operand 12 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:22,596 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-11-22 00:16:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:16:22,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-11-22 00:16:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:22,598 INFO L225 Difference]: With dead ends: 31 [2022-11-22 00:16:22,599 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 00:16:22,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:22,603 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:22,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 00:16:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-11-22 00:16:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-11-22 00:16:22,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2022-11-22 00:16:22,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:22,615 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-11-22 00:16:22,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-11-22 00:16:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 00:16:22,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:22,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:22,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:22,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:22,824 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:22,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1610062143, now seen corresponding path program 1 times [2022-11-22 00:16:22,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:22,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950021685] [2022-11-22 00:16:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:22,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:22,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524093057] [2022-11-22 00:16:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:22,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:22,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:16:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:22,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 00:16:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:22,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:16:22,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950021685] [2022-11-22 00:16:22,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:22,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524093057] [2022-11-22 00:16:22,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524093057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:22,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:22,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24404370] [2022-11-22 00:16:22,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:16:22,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:16:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:22,975 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:23,052 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2022-11-22 00:16:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:16:23,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 00:16:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:23,056 INFO L225 Difference]: With dead ends: 33 [2022-11-22 00:16:23,056 INFO L226 Difference]: Without dead ends: 21 [2022-11-22 00:16:23,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:23,060 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:23,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:23,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-22 00:16:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-22 00:16:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2022-11-22 00:16:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-22 00:16:23,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2022-11-22 00:16:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:23,069 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-22 00:16:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-22 00:16:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:16:23,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:23,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:23,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:23,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 00:16:23,271 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 329749102, now seen corresponding path program 1 times [2022-11-22 00:16:23,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139452886] [2022-11-22 00:16:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:23,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:23,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350106963] [2022-11-22 00:16:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:23,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:23,288 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:23,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:16:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:16:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139452886] [2022-11-22 00:16:23,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350106963] [2022-11-22 00:16:23,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350106963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81840842] [2022-11-22 00:16:23,500 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:23,500 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:23,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:23,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:23,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:23,643 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-22 00:16:23,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2022-11-22 00:16:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:23,720 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:23,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:23,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,535 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:24,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:24,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-22 00:16:24,843 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 28 treesize of output 24 [2022-11-22 00:16:25,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-22 00:16:25,179 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 28 treesize of output 24 [2022-11-22 00:16:25,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:26,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:26,085 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:26,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:26,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-22 00:16:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893010149] [2022-11-22 00:16:26,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 00:16:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 00:16:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2022-11-22 00:16:26,087 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:26,208 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-11-22 00:16:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:16:26,208 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 00:16:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:26,212 INFO L225 Difference]: With dead ends: 49 [2022-11-22 00:16:26,212 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 00:16:26,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-11-22 00:16:26,216 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:26,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 00:16:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2022-11-22 00:16:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-11-22 00:16:26,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2022-11-22 00:16:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:26,231 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-11-22 00:16:26,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-11-22 00:16:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 00:16:26,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:26,232 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:26,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:26,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash -926683905, now seen corresponding path program 2 times [2022-11-22 00:16:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:26,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211912472] [2022-11-22 00:16:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:26,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:26,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491187644] [2022-11-22 00:16:26,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:16:26,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:26,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:26,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:26,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:16:26,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 00:16:26,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 00:16:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:16:26,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 00:16:26,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:26,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211912472] [2022-11-22 00:16:26,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:26,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491187644] [2022-11-22 00:16:26,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491187644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:26,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520575489] [2022-11-22 00:16:26,606 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:26,606 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:26,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:26,606 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:26,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:26,666 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-22 00:16:26,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2022-11-22 00:16:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:26,712 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:26,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,125 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:27,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:27,227 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 28 treesize of output 24 [2022-11-22 00:16:27,321 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 28 treesize of output 24 [2022-11-22 00:16:27,437 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 28 treesize of output 24 [2022-11-22 00:16:27,518 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 28 treesize of output 24 [2022-11-22 00:16:27,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:28,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:28,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:28,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:28,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-22 00:16:28,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831082227] [2022-11-22 00:16:28,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:28,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:16:28,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:28,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:16:28,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:16:28,244 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:28,308 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2022-11-22 00:16:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:16:28,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 00:16:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:28,310 INFO L225 Difference]: With dead ends: 70 [2022-11-22 00:16:28,311 INFO L226 Difference]: Without dead ends: 52 [2022-11-22 00:16:28,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:16:28,312 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:28,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 13 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:28,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-22 00:16:28,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-22 00:16:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-11-22 00:16:28,325 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 15 [2022-11-22 00:16:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:28,325 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-11-22 00:16:28,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-11-22 00:16:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 00:16:28,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:28,326 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:28,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 00:16:28,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:28,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:28,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1016313900, now seen corresponding path program 3 times [2022-11-22 00:16:28,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:28,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162825639] [2022-11-22 00:16:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:28,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:28,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:28,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333243082] [2022-11-22 00:16:28,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:16:28,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:28,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:28,566 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:28,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:16:28,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:16:28,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:28,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 00:16:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-22 00:16:28,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 97 proven. 5 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-22 00:16:28,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162825639] [2022-11-22 00:16:28,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333243082] [2022-11-22 00:16:28,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333243082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:28,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769742101] [2022-11-22 00:16:28,829 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:28,829 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:28,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:28,830 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:28,830 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:28,879 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:28,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:28,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:28,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2022-11-22 00:16:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:28,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 41 [2022-11-22 00:16:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:29,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:29,248 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-22 00:16:29,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 274 treesize of output 277 [2022-11-22 00:16:29,415 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 28 treesize of output 24 [2022-11-22 00:16:29,528 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 28 treesize of output 24 [2022-11-22 00:16:29,608 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 28 treesize of output 24 [2022-11-22 00:16:29,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:30,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1094#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:30,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:30,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:30,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-22 00:16:30,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192175830] [2022-11-22 00:16:30,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:30,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 00:16:30,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 00:16:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2022-11-22 00:16:30,339 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:30,798 INFO L93 Difference]: Finished difference Result 232 states and 289 transitions. [2022-11-22 00:16:30,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:16:30,799 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 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 39 [2022-11-22 00:16:30,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:30,800 INFO L225 Difference]: With dead ends: 232 [2022-11-22 00:16:30,800 INFO L226 Difference]: Without dead ends: 189 [2022-11-22 00:16:30,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=425, Invalid=1057, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 00:16:30,802 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:30,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 86 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:16:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-22 00:16:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 166. [2022-11-22 00:16:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2545454545454546) internal successors, (207), 165 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2022-11-22 00:16:30,832 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 39 [2022-11-22 00:16:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:30,832 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2022-11-22 00:16:30,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:30,832 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2022-11-22 00:16:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-22 00:16:30,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:30,835 INFO L195 NwaCegarLoop]: trace histogram [64, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:30,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:31,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:31,041 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash 847538728, now seen corresponding path program 4 times [2022-11-22 00:16:31,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:31,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527053828] [2022-11-22 00:16:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:31,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:31,082 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:31,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544033963] [2022-11-22 00:16:31,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:16:31,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:31,083 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:31,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:16:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:31,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 00:16:31,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2022-11-22 00:16:31,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3360 backedges. 398 proven. 10 refuted. 0 times theorem prover too weak. 2952 trivial. 0 not checked. [2022-11-22 00:16:31,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527053828] [2022-11-22 00:16:31,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544033963] [2022-11-22 00:16:31,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544033963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [757253224] [2022-11-22 00:16:31,428 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:31,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:31,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:31,429 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:31,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,470 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-22 00:16:31,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2022-11-22 00:16:31,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,530 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:31,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:31,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,908 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:31,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:32,015 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 28 treesize of output 24 [2022-11-22 00:16:32,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-22 00:16:32,160 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 28 treesize of output 24 [2022-11-22 00:16:32,267 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 28 treesize of output 24 [2022-11-22 00:16:32,409 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:32,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2539#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:32,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:32,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:32,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-22 00:16:32,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775830826] [2022-11-22 00:16:32,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:32,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 00:16:32,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:32,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 00:16:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-11-22 00:16:32,949 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:33,177 INFO L93 Difference]: Finished difference Result 511 states and 727 transitions. [2022-11-22 00:16:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:16:33,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-11-22 00:16:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:33,179 INFO L225 Difference]: With dead ends: 511 [2022-11-22 00:16:33,179 INFO L226 Difference]: Without dead ends: 353 [2022-11-22 00:16:33,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 311 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:16:33,190 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 149 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:33,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 30 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-22 00:16:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 334. [2022-11-22 00:16:33,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.1981981981981982) internal successors, (399), 333 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 399 transitions. [2022-11-22 00:16:33,257 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 399 transitions. Word has length 111 [2022-11-22 00:16:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:33,258 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 399 transitions. [2022-11-22 00:16:33,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 399 transitions. [2022-11-22 00:16:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-22 00:16:33,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:33,286 INFO L195 NwaCegarLoop]: trace histogram [160, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:33,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 00:16:33,486 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1109365208, now seen corresponding path program 5 times [2022-11-22 00:16:33,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:33,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346065317] [2022-11-22 00:16:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:33,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:33,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:33,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077910478] [2022-11-22 00:16:33,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:16:33,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:33,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:33,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:33,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:16:35,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-22 00:16:35,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:35,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:16:35,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 1838 proven. 55 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2022-11-22 00:16:36,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15600 backedges. 23 proven. 1870 refuted. 0 times theorem prover too weak. 13707 trivial. 0 not checked. [2022-11-22 00:16:36,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346065317] [2022-11-22 00:16:36,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077910478] [2022-11-22 00:16:36,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077910478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834994364] [2022-11-22 00:16:36,624 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:36,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:36,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:36,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:36,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:36,666 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:36,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:36,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:36,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 37 [2022-11-22 00:16:36,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:36,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:36,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:37,010 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:37,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:37,086 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 28 treesize of output 24 [2022-11-22 00:16:37,152 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 28 treesize of output 24 [2022-11-22 00:16:37,217 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 28 treesize of output 24 [2022-11-22 00:16:37,330 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 28 treesize of output 24 [2022-11-22 00:16:37,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:38,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5385#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:38,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:38,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:38,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2022-11-22 00:16:38,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342053912] [2022-11-22 00:16:38,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:38,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 00:16:38,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:38,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 00:16:38,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=585, Unknown=0, NotChecked=0, Total=992 [2022-11-22 00:16:38,058 INFO L87 Difference]: Start difference. First operand 334 states and 399 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:38,567 INFO L93 Difference]: Finished difference Result 1033 states and 1429 transitions. [2022-11-22 00:16:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 00:16:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2022-11-22 00:16:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:38,570 INFO L225 Difference]: With dead ends: 1033 [2022-11-22 00:16:38,571 INFO L226 Difference]: Without dead ends: 713 [2022-11-22 00:16:38,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 587 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=726, Invalid=1080, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 00:16:38,573 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 427 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:38,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 66 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:16:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-11-22 00:16:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 670. [2022-11-22 00:16:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 1.1704035874439462) internal successors, (783), 669 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:38,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 783 transitions. [2022-11-22 00:16:38,667 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 783 transitions. Word has length 207 [2022-11-22 00:16:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:38,668 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 783 transitions. [2022-11-22 00:16:38,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 783 transitions. [2022-11-22 00:16:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-22 00:16:38,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:38,675 INFO L195 NwaCegarLoop]: trace histogram [352, 16, 16, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:38,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:38,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-22 00:16:38,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1325926872, now seen corresponding path program 6 times [2022-11-22 00:16:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038503286] [2022-11-22 00:16:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:39,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176267694] [2022-11-22 00:16:39,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:16:39,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:39,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:39,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:39,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:16:39,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:16:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:16:39,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 00:16:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2022-11-22 00:16:40,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 67728 backedges. 25702 proven. 3206 refuted. 0 times theorem prover too weak. 38820 trivial. 0 not checked. [2022-11-22 00:16:41,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038503286] [2022-11-22 00:16:41,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:41,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176267694] [2022-11-22 00:16:41,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176267694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:41,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341378330] [2022-11-22 00:16:41,264 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:41,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:41,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:41,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:41,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,306 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-22 00:16:41,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2022-11-22 00:16:41,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,345 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:41,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:41,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,638 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:41,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:41,751 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 28 treesize of output 24 [2022-11-22 00:16:41,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-22 00:16:41,878 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 28 treesize of output 24 [2022-11-22 00:16:41,945 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 28 treesize of output 24 [2022-11-22 00:16:42,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:42,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10999#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:42,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:42,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:42,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-11-22 00:16:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465381374] [2022-11-22 00:16:42,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:42,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-22 00:16:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-22 00:16:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1264, Invalid=2768, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 00:16:42,877 INFO L87 Difference]: Start difference. First operand 670 states and 783 transitions. Second operand has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:46,366 INFO L93 Difference]: Finished difference Result 2380 states and 2716 transitions. [2022-11-22 00:16:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-22 00:16:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 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 399 [2022-11-22 00:16:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:46,373 INFO L225 Difference]: With dead ends: 2380 [2022-11-22 00:16:46,373 INFO L226 Difference]: Without dead ends: 1809 [2022-11-22 00:16:46,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1132 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10947 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=8547, Invalid=19509, Unknown=0, NotChecked=0, Total=28056 [2022-11-22 00:16:46,386 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 539 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:46,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 536 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 00:16:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-11-22 00:16:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1654. [2022-11-22 00:16:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 1.1669691470054446) internal successors, (1929), 1653 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 1929 transitions. [2022-11-22 00:16:46,589 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 1929 transitions. Word has length 399 [2022-11-22 00:16:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:46,590 INFO L495 AbstractCegarLoop]: Abstraction has 1654 states and 1929 transitions. [2022-11-22 00:16:46,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 1929 transitions. [2022-11-22 00:16:46,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-22 00:16:46,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:46,625 INFO L195 NwaCegarLoop]: trace histogram [880, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:46,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:46,835 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:46,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1847031600, now seen corresponding path program 7 times [2022-11-22 00:16:46,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:46,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457248387] [2022-11-22 00:16:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:46,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:47,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:47,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621212124] [2022-11-22 00:16:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:16:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:47,130 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:16:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 6504 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 00:16:48,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2022-11-22 00:16:49,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 423696 backedges. 20678 proven. 253 refuted. 0 times theorem prover too weak. 402765 trivial. 0 not checked. [2022-11-22 00:16:50,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457248387] [2022-11-22 00:16:50,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 00:16:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621212124] [2022-11-22 00:16:50,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621212124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:50,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [178165102] [2022-11-22 00:16:50,052 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 00:16:50,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:50,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:50,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:50,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:50,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:50,092 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-22 00:16:50,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2022-11-22 00:16:50,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:50,131 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-22 00:16:50,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-22 00:16:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:50,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2022-11-22 00:16:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:50,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:50,546 INFO L321 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2022-11-22 00:16:50,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 278 treesize of output 275 [2022-11-22 00:16:50,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-22 00:16:50,693 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 28 treesize of output 24 [2022-11-22 00:16:50,757 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 28 treesize of output 24 [2022-11-22 00:16:50,830 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 28 treesize of output 24 [2022-11-22 00:16:50,952 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:51,559 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24486#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_~C~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* (* |ULTIMATE.start_main_~n~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) |ULTIMATE.start_main_~i~0#1|))) |ULTIMATE.start_main_#t~mem5#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~C~0#1| 2147483647) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem5#1| |ULTIMATE.start_main_~C~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1000) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:51,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:51,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 00:16:51,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2022-11-22 00:16:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491239767] [2022-11-22 00:16:51,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-22 00:16:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-22 00:16:51,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=1725, Unknown=0, NotChecked=0, Total=3080 [2022-11-22 00:16:51,563 INFO L87 Difference]: Start difference. First operand 1654 states and 1929 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:53,319 INFO L93 Difference]: Finished difference Result 5053 states and 6997 transitions. [2022-11-22 00:16:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 00:16:53,319 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 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 975 [2022-11-22 00:16:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:53,332 INFO L225 Difference]: With dead ends: 5053 [2022-11-22 00:16:53,333 INFO L226 Difference]: Without dead ends: 3425 [2022-11-22 00:16:53,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2946 GetRequests, 2867 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2574, Invalid=3588, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 00:16:53,337 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 852 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:53,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 138 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:16:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2022-11-22 00:16:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3334. [2022-11-22 00:16:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 3333 states have (on average 1.1548154815481548) internal successors, (3849), 3333 states have internal predecessors, (3849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 3849 transitions. [2022-11-22 00:16:53,697 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 3849 transitions. Word has length 975 [2022-11-22 00:16:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:53,698 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 3849 transitions. [2022-11-22 00:16:53,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 49 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 3849 transitions. [2022-11-22 00:16:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1936 [2022-11-22 00:16:53,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:53,726 INFO L195 NwaCegarLoop]: trace histogram [1840, 40, 40, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:53,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:53,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:16:53,931 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 00:16:53,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 340447440, now seen corresponding path program 8 times [2022-11-22 00:16:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:53,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163961008] [2022-11-22 00:16:53,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:53,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:54,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 00:16:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480351032] [2022-11-22 00:16:54,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:16:54,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:54,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:54,523 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:54,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c863006-3903-4e3e-9555-92ecb780f8bd/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process