./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr3.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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:17:41,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:17:41,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:17:41,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:17:41,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:17:41,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:17:41,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:17:41,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:17:41,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:17:41,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:17:41,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:17:41,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:17:41,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:17:41,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:17:41,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:17:41,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:17:41,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:17:41,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:17:41,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:17:41,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:17:41,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:17:41,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:17:41,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:17:41,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:17:41,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:17:41,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:17:41,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:17:41,174 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:17:41,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:17:41,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:17:41,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:17:41,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:17:41,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:17:41,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:17:41,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:17:41,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:17:41,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:17:41,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:17:41,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:17:41,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:17:41,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:17:41,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:17:41,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:17:41,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:17:41,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:17:41,234 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:17:41,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:17:41,235 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:17:41,235 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:17:41,236 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:17:41,236 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:17:41,236 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:17:41,236 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:17:41,237 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:17:41,237 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:17:41,238 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:17:41,238 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:17:41,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:17:41,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:17:41,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:17:41,239 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:17:41,239 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:17:41,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:17:41,239 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:17:41,240 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:17:41,240 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:17:41,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:17:41,240 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:17:41,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:17:41,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:41,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:17:41,241 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:17:41,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:17:41,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:17:41,242 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:17:41,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:17:41,243 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:17:41,243 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:17:41,243 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2022-11-22 02:17:41,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:17:41,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:17:41,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:17:41,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:17:41,712 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:17:41,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-tiling/mbpr3.c [2022-11-22 02:17:44,903 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:17:45,110 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:17:45,111 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c [2022-11-22 02:17:45,118 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/9ce0c5280/a5f264713a2844d8a291cc70db413458/FLAG2fce9a27e [2022-11-22 02:17:45,133 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/9ce0c5280/a5f264713a2844d8a291cc70db413458 [2022-11-22 02:17:45,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:17:45,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:17:45,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:45,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:17:45,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:17:45,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdd4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45, skipping insertion in model container [2022-11-22 02:17:45,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:17:45,175 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:17:45,330 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2022-11-22 02:17:45,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:45,367 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:17:45,381 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2022-11-22 02:17:45,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:45,434 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:17:45,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45 WrapperNode [2022-11-22 02:17:45,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:45,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:45,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:17:45,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:17:45,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,457 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,481 INFO L138 Inliner]: procedures = 15, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 115 [2022-11-22 02:17:45,481 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:45,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:17:45,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:17:45,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:17:45,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,509 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:17:45,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:17:45,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:17:45,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:17:45,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (1/1) ... [2022-11-22 02:17:45,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:45,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:45,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:17:45,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:17:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:17:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:17:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:17:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:17:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:17:45,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:17:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:17:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:17:45,664 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:17:45,666 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:17:45,999 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:17:46,225 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:17:46,225 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:17:46,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:46 BoogieIcfgContainer [2022-11-22 02:17:46,229 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:17:46,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:17:46,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:17:46,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:17:46,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:17:45" (1/3) ... [2022-11-22 02:17:46,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7a4ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:46, skipping insertion in model container [2022-11-22 02:17:46,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:45" (2/3) ... [2022-11-22 02:17:46,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7a4ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:46, skipping insertion in model container [2022-11-22 02:17:46,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:46" (3/3) ... [2022-11-22 02:17:46,253 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2022-11-22 02:17:46,329 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:17:46,329 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:17:46,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:17:46,502 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;@2abda12f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:17:46,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:17:46,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:17:46,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:46,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:46,523 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash 383781863, now seen corresponding path program 1 times [2022-11-22 02:17:46,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:46,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925403789] [2022-11-22 02:17:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:46,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:47,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925403789] [2022-11-22 02:17:47,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925403789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:47,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:47,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:17:47,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293840840] [2022-11-22 02:17:47,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:47,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:17:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:17:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:47,363 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:17:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:47,461 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2022-11-22 02:17:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:17:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:17:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:47,476 INFO L225 Difference]: With dead ends: 28 [2022-11-22 02:17:47,476 INFO L226 Difference]: Without dead ends: 12 [2022-11-22 02:17:47,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:17:47,493 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:47,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:17:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-22 02:17:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-22 02:17:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-22 02:17:47,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 9 [2022-11-22 02:17:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:47,536 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-22 02:17:47,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 02:17:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-22 02:17:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:17:47,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:47,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:47,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:17:47,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash 308643540, now seen corresponding path program 1 times [2022-11-22 02:17:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:47,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782529758] [2022-11-22 02:17:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:17:47,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:17:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782529758] [2022-11-22 02:17:47,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782529758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:47,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:17:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553700276] [2022-11-22 02:17:47,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:47,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:47,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:17:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:47,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:47,972 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:48,084 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-11-22 02:17:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 02:17:48,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:48,086 INFO L225 Difference]: With dead ends: 20 [2022-11-22 02:17:48,086 INFO L226 Difference]: Without dead ends: 14 [2022-11-22 02:17:48,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:48,097 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:48,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:17:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-22 02:17:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-22 02:17:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 02:17:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-22 02:17:48,107 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2022-11-22 02:17:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:48,107 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-22 02:17:48,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-22 02:17:48,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:17:48,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:48,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:48,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:17:48,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:48,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1611323004, now seen corresponding path program 1 times [2022-11-22 02:17:48,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:17:48,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779709799] [2022-11-22 02:17:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:17:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:49,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:17:49,216 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:383) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:154) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:198) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 02:17:49,225 INFO L158 Benchmark]: Toolchain (without parser) took 4088.25ms. Allocated memory was 159.4MB in the beginning and 195.0MB in the end (delta: 35.7MB). Free memory was 94.8MB in the beginning and 112.4MB in the end (delta: -17.6MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,226 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 159.4MB. Free memory was 135.0MB in the beginning and 134.8MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:17:49,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.89ms. Allocated memory is still 159.4MB. Free memory was 94.6MB in the beginning and 131.1MB in the end (delta: -36.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,227 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.33ms. Allocated memory is still 159.4MB. Free memory was 131.1MB in the beginning and 129.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,228 INFO L158 Benchmark]: Boogie Preprocessor took 30.28ms. Allocated memory is still 159.4MB. Free memory was 129.2MB in the beginning and 127.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,228 INFO L158 Benchmark]: RCFGBuilder took 715.83ms. Allocated memory is still 159.4MB. Free memory was 127.7MB in the beginning and 107.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,229 INFO L158 Benchmark]: TraceAbstraction took 2992.71ms. Allocated memory was 159.4MB in the beginning and 195.0MB in the end (delta: 35.7MB). Free memory was 107.3MB in the beginning and 112.4MB in the end (delta: -5.0MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. [2022-11-22 02:17:49,232 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 159.4MB. Free memory was 135.0MB in the beginning and 134.8MB in the end (delta: 174.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.89ms. Allocated memory is still 159.4MB. Free memory was 94.6MB in the beginning and 131.1MB in the end (delta: -36.4MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.33ms. Allocated memory is still 159.4MB. Free memory was 131.1MB in the beginning and 129.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.28ms. Allocated memory is still 159.4MB. Free memory was 129.2MB in the beginning and 127.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 715.83ms. Allocated memory is still 159.4MB. Free memory was 127.7MB in the beginning and 107.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 2992.71ms. Allocated memory was 159.4MB in the beginning and 195.0MB in the end (delta: 35.7MB). Free memory was 107.3MB in the beginning and 112.4MB in the end (delta: -5.0MB). Peak memory consumption was 69.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkInductivity(InterpolantChecker.java:409) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-22 02:17:49,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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 a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 02:17:52,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:17:52,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:17:52,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:17:52,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:17:52,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:17:52,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:17:52,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:17:52,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:17:52,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:17:52,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:17:52,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:17:52,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:17:52,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:17:52,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:17:52,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:17:52,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:17:52,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:17:52,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:17:52,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:17:52,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:17:52,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:17:52,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:17:52,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:17:52,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:17:52,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:17:52,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:17:52,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:17:52,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:17:52,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:17:52,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:17:52,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:17:52,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:17:52,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:17:52,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:17:52,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:17:52,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:17:52,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:17:52,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:17:52,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:17:52,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:17:52,269 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-22 02:17:52,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:17:52,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:17:52,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:17:52,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:17:52,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:17:52,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:17:52,318 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:17:52,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:17:52,319 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:17:52,319 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:17:52,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:17:52,321 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:17:52,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:17:52,322 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:17:52,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:17:52,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:17:52,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:17:52,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:17:52,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:17:52,324 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:17:52,324 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:17:52,324 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:17:52,324 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:17:52,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:17:52,325 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:17:52,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:17:52,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:17:52,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:17:52,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:17:52,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:52,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:17:52,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:17:52,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:17:52,328 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:17:52,328 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:52,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:17:52,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:17:52,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:17:52,329 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50e57e46342104030586dde3ea26bc2e3984490f4fdef34fa383d24842d8980 [2022-11-22 02:17:52,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:17:52,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:17:52,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:17:52,802 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:17:52,803 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:17:52,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-tiling/mbpr3.c [2022-11-22 02:17:56,390 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:17:56,706 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:17:56,707 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c [2022-11-22 02:17:56,715 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/e0c7b33c8/8b800160b2c7486e850bec9b223f738f/FLAGddcadf085 [2022-11-22 02:17:56,735 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/data/e0c7b33c8/8b800160b2c7486e850bec9b223f738f [2022-11-22 02:17:56,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:17:56,740 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:17:56,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:56,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:17:56,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:17:56,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:56" (1/1) ... [2022-11-22 02:17:56,751 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efabc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:56, skipping insertion in model container [2022-11-22 02:17:56,751 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:17:56" (1/1) ... [2022-11-22 02:17:56,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:17:56,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:17:57,058 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2022-11-22 02:17:57,117 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:57,135 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:17:57,161 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_7213a6d3-f00c-4e71-8edc-af6542a6cc06/sv-benchmarks/c/array-tiling/mbpr3.c[396,409] [2022-11-22 02:17:57,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:17:57,233 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:17:57,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57 WrapperNode [2022-11-22 02:17:57,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:17:57,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:57,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:17:57,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:17:57,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,319 INFO L138 Inliner]: procedures = 17, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 114 [2022-11-22 02:17:57,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:17:57,324 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:17:57,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:17:57,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:17:57,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:17:57,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:17:57,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:17:57,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:17:57,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (1/1) ... [2022-11-22 02:17:57,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:17:57,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:57,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:17:57,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:17:57,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:17:57,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:17:57,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:17:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 02:17:57,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:17:57,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:17:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 02:17:57,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:17:57,606 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:17:57,608 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:17:58,175 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:17:58,182 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:17:58,182 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 02:17:58,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:58 BoogieIcfgContainer [2022-11-22 02:17:58,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:17:58,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:17:58,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:17:58,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:17:58,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:17:56" (1/3) ... [2022-11-22 02:17:58,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c49747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:58, skipping insertion in model container [2022-11-22 02:17:58,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:17:57" (2/3) ... [2022-11-22 02:17:58,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c49747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:17:58, skipping insertion in model container [2022-11-22 02:17:58,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:17:58" (3/3) ... [2022-11-22 02:17:58,216 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2022-11-22 02:17:58,275 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:17:58,275 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:17:58,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:17:58,383 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;@7af49b78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:17:58,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:17:58,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:17:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 02:17:58,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:58,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:58,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:58,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash -565609025, now seen corresponding path program 1 times [2022-11-22 02:17:58,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:58,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709290101] [2022-11-22 02:17:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:58,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:17:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:58,442 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:17:58,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-22 02:17:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:58,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-22 02:17:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:58,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:58,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:58,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709290101] [2022-11-22 02:17:58,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709290101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:58,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:58,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:17:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700161215] [2022-11-22 02:17:58,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:58,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 02:17:58,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 02:17:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:17:58,787 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 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 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 02:17:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:58,826 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2022-11-22 02:17:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 02:17:58,830 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 17 [2022-11-22 02:17:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:58,842 INFO L225 Difference]: With dead ends: 63 [2022-11-22 02:17:58,842 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 02:17:58,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 02:17:58,854 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:58,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:17:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 02:17:58,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-22 02:17:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 02:17:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-11-22 02:17:58,924 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-11-22 02:17:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:58,925 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-11-22 02:17:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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 02:17:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-11-22 02:17:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 02:17:58,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:58,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:58,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:59,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:17:59,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:17:59,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:59,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1539779609, now seen corresponding path program 1 times [2022-11-22 02:17:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659218775] [2022-11-22 02:17:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:59,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:17:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:59,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:17:59,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-22 02:17:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:17:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:00,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:00,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659218775] [2022-11-22 02:18:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659218775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:00,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:00,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 02:18:00,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881015645] [2022-11-22 02:18:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:18:00,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:18:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:18:00,303 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 02:18:01,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:01,622 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2022-11-22 02:18:01,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:18:01,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 17 [2022-11-22 02:18:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:01,629 INFO L225 Difference]: With dead ends: 60 [2022-11-22 02:18:01,630 INFO L226 Difference]: Without dead ends: 41 [2022-11-22 02:18:01,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:18:01,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:01,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 23 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:18:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-22 02:18:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-11-22 02:18:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-22 02:18:01,644 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2022-11-22 02:18:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:01,645 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-22 02:18:01,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 02:18:01,646 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-22 02:18:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:18:01,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:01,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:01,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:01,863 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:01,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:01,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2048665896, now seen corresponding path program 1 times [2022-11-22 02:18:01,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:01,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637052420] [2022-11-22 02:18:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:01,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:01,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:01,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:18:01,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-22 02:18:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:02,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:18:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:18:02,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:02,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637052420] [2022-11-22 02:18:02,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637052420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:02,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:02,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:18:02,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225156305] [2022-11-22 02:18:02,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:02,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:18:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:18:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:18:02,331 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:02,392 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-22 02:18:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:18:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2022-11-22 02:18:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:02,397 INFO L225 Difference]: With dead ends: 45 [2022-11-22 02:18:02,397 INFO L226 Difference]: Without dead ends: 32 [2022-11-22 02:18:02,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 02:18:02,405 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:02,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:18:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-22 02:18:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-22 02:18:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-22 02:18:02,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 29 [2022-11-22 02:18:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:02,431 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-22 02:18:02,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-22 02:18:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:18:02,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:02,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:02,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:02,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:02,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1853274390, now seen corresponding path program 1 times [2022-11-22 02:18:02,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609494038] [2022-11-22 02:18:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:02,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:02,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:18:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-22 02:18:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:18:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:18:02,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:02,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:02,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609494038] [2022-11-22 02:18:02,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609494038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:02,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:18:02,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:18:02,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098253302] [2022-11-22 02:18:02,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:02,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:18:02,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:18:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:18:02,909 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:02,970 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-11-22 02:18:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:18:02,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2022-11-22 02:18:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:02,972 INFO L225 Difference]: With dead ends: 42 [2022-11-22 02:18:02,972 INFO L226 Difference]: Without dead ends: 40 [2022-11-22 02:18:02,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:18:02,974 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:02,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 97 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:18:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-22 02:18:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-11-22 02:18:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-22 02:18:02,986 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2022-11-22 02:18:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:02,986 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-22 02:18:02,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:02,987 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-22 02:18:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:18:02,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:02,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:03,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:03,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:03,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:03,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1853333972, now seen corresponding path program 1 times [2022-11-22 02:18:03,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:03,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362715932] [2022-11-22 02:18:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:03,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:03,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:03,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:18:03,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-22 02:18:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:18:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:03,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:03,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:03,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:03,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:03,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:03,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:03,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:03,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:03,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:04,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:04,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:13,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 02:18:13,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1090 treesize of output 1074 [2022-11-22 02:18:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:17,730 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362715932] [2022-11-22 02:18:17,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362715932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:17,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754195438] [2022-11-22 02:18:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:17,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:17,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 02:18:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:18:18,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:18,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:18,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:18,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:18,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:18,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:18,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:19,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:19,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:29,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 02:18:30,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 122 [2022-11-22 02:18:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754195438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:30,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535050443] [2022-11-22 02:18:30,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:30,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:30,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:30,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:18:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:18:30,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:30,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:30,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:30,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:30,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:30,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:30,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-22 02:18:30,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:40,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 02:18:40,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 258 [2022-11-22 02:18:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:40,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535050443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:40,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:18:40,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11, 8, 11] total 16 [2022-11-22 02:18:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479346109] [2022-11-22 02:18:40,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:18:40,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:18:40,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:40,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:18:40,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=182, Unknown=2, NotChecked=0, Total=240 [2022-11-22 02:18:40,747 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:44,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:44,710 INFO L93 Difference]: Finished difference Result 171 states and 203 transitions. [2022-11-22 02:18:44,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:18:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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 29 [2022-11-22 02:18:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:44,714 INFO L225 Difference]: With dead ends: 171 [2022-11-22 02:18:44,714 INFO L226 Difference]: Without dead ends: 144 [2022-11-22 02:18:44,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 137 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=278, Invalid=712, Unknown=2, NotChecked=0, Total=992 [2022-11-22 02:18:44,716 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 297 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:44,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 142 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 02:18:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-22 02:18:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 56. [2022-11-22 02:18:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-22 02:18:44,733 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 29 [2022-11-22 02:18:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:44,734 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-22 02:18:44,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:18:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-22 02:18:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:18:44,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:44,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:18:44,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:44,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:45,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:45,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:18:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -166695065, now seen corresponding path program 1 times [2022-11-22 02:18:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:45,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118293023] [2022-11-22 02:18:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:45,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:18:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:45,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:18:45,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-22 02:18:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:18:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:45,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:45,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:45,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:45,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-22 02:18:46,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:46,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:51,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:18:51,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 122 [2022-11-22 02:18:51,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:51,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118293023] [2022-11-22 02:18:51,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118293023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:51,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1289149912] [2022-11-22 02:18:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:51,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:51,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:51,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:51,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-22 02:18:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:52,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:18:52,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:52,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:52,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:52,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:52,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:52,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:52,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:52,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-22 02:18:52,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:57,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:18:57,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 546 treesize of output 530 [2022-11-22 02:18:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:58,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1289149912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845431971] [2022-11-22 02:18:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:58,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:58,025 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:58,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:18:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:58,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:18:58,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:58,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:18:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:18:58,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:18:58,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:58,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-11-22 02:18:58,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:18:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:18:58,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:03,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:19:03,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 546 treesize of output 530 [2022-11-22 02:19:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:19:03,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845431971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:03,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:03,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11, 8, 11] total 16 [2022-11-22 02:19:03,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151314227] [2022-11-22 02:19:03,804 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:03,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:19:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:19:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=186, Unknown=2, NotChecked=0, Total=240 [2022-11-22 02:19:03,808 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:05,784 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2022-11-22 02:19:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:19:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 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 35 [2022-11-22 02:19:05,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:05,786 INFO L225 Difference]: With dead ends: 133 [2022-11-22 02:19:05,786 INFO L226 Difference]: Without dead ends: 91 [2022-11-22 02:19:05,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 176 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=162, Invalid=436, Unknown=2, NotChecked=0, Total=600 [2022-11-22 02:19:05,788 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 174 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:05,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 147 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 02:19:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-22 02:19:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 51. [2022-11-22 02:19:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-22 02:19:05,806 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 35 [2022-11-22 02:19:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:05,807 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-22 02:19:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-22 02:19:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:19:05,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:05,809 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:05,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:06,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:06,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:06,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:06,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:06,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:06,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1674688058, now seen corresponding path program 2 times [2022-11-22 02:19:06,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:06,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977749936] [2022-11-22 02:19:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:06,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:19:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:06,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:19:06,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-22 02:19:06,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:06,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:19:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:08,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:10,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977749936] [2022-11-22 02:19:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977749936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:10,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1506007538] [2022-11-22 02:19:10,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:10,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:10,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:10,440 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:10,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-22 02:19:10,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:10,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:19:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:12,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1506007538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392404970] [2022-11-22 02:19:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:12,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:12,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:12,624 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:12,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:19:12,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:19:12,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:13,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 02:19:14,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392404970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:14,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:14,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 13 [2022-11-22 02:19:14,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092560921] [2022-11-22 02:19:14,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:14,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:19:14,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:14,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:19:14,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:19:14,531 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:18,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:18,780 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2022-11-22 02:19:18,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:19:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 02:19:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:18,787 INFO L225 Difference]: With dead ends: 154 [2022-11-22 02:19:18,787 INFO L226 Difference]: Without dead ends: 116 [2022-11-22 02:19:18,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:19:18,788 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:18,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 68 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 02:19:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-22 02:19:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 71. [2022-11-22 02:19:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2022-11-22 02:19:18,810 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 37 [2022-11-22 02:19:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:18,811 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2022-11-22 02:19:18,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2022-11-22 02:19:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:19:18,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:18,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:18,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:19,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:19,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:19,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:19,422 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:19,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:19,423 INFO L85 PathProgramCache]: Analyzing trace with hash 693076666, now seen corresponding path program 2 times [2022-11-22 02:19:19,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:19,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969458283] [2022-11-22 02:19:19,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:19,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:19:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:19,424 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:19:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-22 02:19:19,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:19:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:19,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:19,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:19:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:20,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:20,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:19:20,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 530 treesize of output 514 [2022-11-22 02:19:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:20,746 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969458283] [2022-11-22 02:19:20,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969458283] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:20,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1803075668] [2022-11-22 02:19:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:20,748 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:20,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-22 02:19:21,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:21,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:21,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:19:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:21,160 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 16 treesize of output 12 [2022-11-22 02:19:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:21,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:19:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:21,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:21,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:19:21,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1074 treesize of output 1042 [2022-11-22 02:19:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:22,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1803075668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:22,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531619616] [2022-11-22 02:19:22,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:19:22,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:22,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:22,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:22,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:19:22,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:19:22,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:22,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:19:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:22,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:19:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:19:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:22,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:23,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-22 02:19:23,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2022-11-22 02:19:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:19:23,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531619616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:23,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:23,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 11, 10] total 18 [2022-11-22 02:19:23,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910541434] [2022-11-22 02:19:23,091 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:23,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:19:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:19:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:19:23,093 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:25,334 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2022-11-22 02:19:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-22 02:19:25,335 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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 41 [2022-11-22 02:19:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:25,335 INFO L225 Difference]: With dead ends: 135 [2022-11-22 02:19:25,335 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 02:19:25,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 219 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=435, Invalid=1371, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 02:19:25,337 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 360 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:25,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 110 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 02:19:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 02:19:25,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2022-11-22 02:19:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 88 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2022-11-22 02:19:25,360 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 41 [2022-11-22 02:19:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:25,361 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2022-11-22 02:19:25,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:19:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2022-11-22 02:19:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:19:25,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:25,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:25,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:25,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:25,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:25,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:25,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:19:25,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:25,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1442159932, now seen corresponding path program 3 times [2022-11-22 02:19:25,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:25,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202742133] [2022-11-22 02:19:25,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:19:25,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:19:25,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:25,975 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:19:25,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-22 02:19:26,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:19:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:19:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:29,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:35,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:35,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202742133] [2022-11-22 02:19:35,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202742133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:35,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343577072] [2022-11-22 02:19:35,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:19:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:35,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:35,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 02:19:35,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:19:35,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:19:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:36,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:38,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343577072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922848759] [2022-11-22 02:19:38,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:19:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:38,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:38,662 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:38,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:19:39,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:19:39,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:19:39,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:19:39,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:43,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:19:49,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922848759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:49,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:49,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 12, 13, 10] total 33 [2022-11-22 02:19:49,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791574756] [2022-11-22 02:19:49,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:49,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-22 02:19:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-22 02:19:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 02:19:49,598 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:20,148 INFO L93 Difference]: Finished difference Result 341 states and 393 transitions. [2022-11-22 02:20:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 02:20:20,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 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 45 [2022-11-22 02:20:20,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:20,154 INFO L225 Difference]: With dead ends: 341 [2022-11-22 02:20:20,154 INFO L226 Difference]: Without dead ends: 279 [2022-11-22 02:20:20,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=1087, Invalid=3335, Unknown=0, NotChecked=0, Total=4422 [2022-11-22 02:20:20,157 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 737 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:20,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 342 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-22 02:20:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-22 02:20:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 168. [2022-11-22 02:20:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2022-11-22 02:20:20,199 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 45 [2022-11-22 02:20:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:20,200 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2022-11-22 02:20:20,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2022-11-22 02:20:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:20:20,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:20,202 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:20,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:20,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:20,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:20,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:20,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:20,815 INFO L85 PathProgramCache]: Analyzing trace with hash -296121395, now seen corresponding path program 3 times [2022-11-22 02:20:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:20,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765414658] [2022-11-22 02:20:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:20:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:20:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:20,817 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:20:20,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-22 02:20:21,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:20:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:21,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:20:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:21,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:21,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:20:21,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:20:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:20:21,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:22,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-22 02:20:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 274 [2022-11-22 02:20:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:20:22,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765414658] [2022-11-22 02:20:22,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765414658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:22,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1351622738] [2022-11-22 02:20:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:20:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:22,268 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:22,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-22 02:20:22,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:20:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 02:20:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-22 02:20:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:23,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 40 [2022-11-22 02:20:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:23,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-22 02:20:23,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:23,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 43 [2022-11-22 02:20:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:23,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 54 [2022-11-22 02:20:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:23,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:20:23,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 46 [2022-11-22 02:20:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:24,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:28,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1351622738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344447978] [2022-11-22 02:20:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:20:28,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:28,450 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:28,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:20:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 02:20:28,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:20:28,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:28,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:20:28,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:28,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:20:28,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:20:29,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:20:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:20:29,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:29,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-22 02:20:29,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 274 [2022-11-22 02:20:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-22 02:20:29,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344447978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:29,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:29,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 13, 19, 9, 10] total 45 [2022-11-22 02:20:29,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425901486] [2022-11-22 02:20:29,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-22 02:20:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-22 02:20:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:20:29,564 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:36,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:20:38,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:38,510 INFO L93 Difference]: Finished difference Result 250 states and 279 transitions. [2022-11-22 02:20:38,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 02:20:38,511 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 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 47 [2022-11-22 02:20:38,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:38,512 INFO L225 Difference]: With dead ends: 250 [2022-11-22 02:20:38,512 INFO L226 Difference]: Without dead ends: 240 [2022-11-22 02:20:38,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 224 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1596, Invalid=5544, Unknown=0, NotChecked=0, Total=7140 [2022-11-22 02:20:38,516 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1125 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 285 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:38,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 241 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 710 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2022-11-22 02:20:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-22 02:20:38,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 168. [2022-11-22 02:20:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.155688622754491) internal successors, (193), 167 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:38,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 193 transitions. [2022-11-22 02:20:38,556 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 193 transitions. Word has length 47 [2022-11-22 02:20:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:38,557 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 193 transitions. [2022-11-22 02:20:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:20:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 193 transitions. [2022-11-22 02:20:38,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:20:38,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:38,559 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:38,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-22 02:20:38,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:38,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:39,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:39,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:20:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:39,166 INFO L85 PathProgramCache]: Analyzing trace with hash -689148405, now seen corresponding path program 4 times [2022-11-22 02:20:39,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:39,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239274259] [2022-11-22 02:20:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:20:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:20:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:39,168 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:20:39,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-22 02:20:39,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:20:39,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:39,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:20:39,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:46,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:51,132 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:51,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239274259] [2022-11-22 02:20:51,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239274259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:51,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [561561202] [2022-11-22 02:20:51,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:20:51,132 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:51,134 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:51,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 02:20:51,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:20:51,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:51,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:20:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:56,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:20:59,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [561561202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:59,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065287204] [2022-11-22 02:20:59,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:20:59,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:59,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:59,337 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:59,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:20:59,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:20:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:20:59,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:21:04,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:21:05,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065287204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:05,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:21:05,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 12, 11, 10] total 22 [2022-11-22 02:21:05,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711049694] [2022-11-22 02:21:05,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:05,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:21:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:21:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:21:05,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:21:05,129 INFO L87 Difference]: Start difference. First operand 168 states and 193 transitions. Second operand has 22 states, 22 states have (on average 6.090909090909091) internal successors, (134), 22 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:10,180 INFO L93 Difference]: Finished difference Result 207 states and 231 transitions. [2022-11-22 02:21:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:21:10,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.090909090909091) internal successors, (134), 22 states have internal predecessors, (134), 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 47 [2022-11-22 02:21:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:10,186 INFO L225 Difference]: With dead ends: 207 [2022-11-22 02:21:10,186 INFO L226 Difference]: Without dead ends: 165 [2022-11-22 02:21:10,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2022-11-22 02:21:10,188 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 246 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:10,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 142 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 02:21:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-22 02:21:10,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-11-22 02:21:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.13125) internal successors, (181), 160 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2022-11-22 02:21:10,222 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 47 [2022-11-22 02:21:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:10,222 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2022-11-22 02:21:10,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.090909090909091) internal successors, (134), 22 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:21:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2022-11-22 02:21:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-22 02:21:10,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:10,224 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:21:10,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:10,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:10,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 02:21:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:10,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:21:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1768711502, now seen corresponding path program 4 times [2022-11-22 02:21:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:21:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628271860] [2022-11-22 02:21:10,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:21:10,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:21:10,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:21:10,833 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:21:10,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7213a6d3-f00c-4e71-8edc-af6542a6cc06/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-22 02:21:11,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:21:11,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:21:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-22 02:21:11,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:11,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 02:21:11,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 40 [2022-11-22 02:21:11,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 40 [2022-11-22 02:21:11,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:11,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:21:11,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-22 02:21:11,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 40 [2022-11-22 02:21:11,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:11,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:21:11,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:11,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2022-11-22 02:21:12,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:12,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 40 [2022-11-22 02:21:12,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-22 02:21:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:21:12,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 29 [2022-11-22 02:21:12,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 02:21:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:12,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:39,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 76 [2022-11-22 02:21:52,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19400232921070 treesize of output 19395937953774