./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/heavy-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/heavy-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh --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 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a --- 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-2329fc7 [2022-12-14 05:00:20,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:00:20,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:00:20,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:00:20,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:00:20,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:00:20,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:00:20,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:00:20,294 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:00:20,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:00:20,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:00:20,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:00:20,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:00:20,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:00:20,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:00:20,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:00:20,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:00:20,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:00:20,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:00:20,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:00:20,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:00:20,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:00:20,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:00:20,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:00:20,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:00:20,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:00:20,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:00:20,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:00:20,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:00:20,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:00:20,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:00:20,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:00:20,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:00:20,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:00:20,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:00:20,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:00:20,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:00:20,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:00:20,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:00:20,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:00:20,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:00:20,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:00:20,330 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:00:20,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:00:20,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:00:20,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:00:20,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:00:20,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:00:20,332 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:00:20,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:00:20,332 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:00:20,332 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:00:20,332 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:00:20,333 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:00:20,333 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:00:20,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:00:20,334 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:00:20,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:00:20,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:00:20,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:00:20,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:00:20,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:00:20,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:00:20,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:00:20,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:00:20,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:00:20,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:00:20,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:00:20,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:00:20,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:00:20,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:00:20,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:00:20,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:00:20,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:00:20,337 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:00:20,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:00:20,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:00:20,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:00:20,338 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_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 544ff1a31d34f1c818140bb31fb5c7091aef904c3b9f7e17a0cc8560e99eb61a [2022-12-14 05:00:20,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:00:20,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:00:20,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:00:20,530 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:00:20,531 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:00:20,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/heavy-1.c [2022-12-14 05:00:23,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:00:23,184 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:00:23,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/sv-benchmarks/c/loops/heavy-1.c [2022-12-14 05:00:23,188 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/data/f29921cc4/12a8ad0d67ef469e86b2e04610862788/FLAG25fd1efdc [2022-12-14 05:00:23,599 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/data/f29921cc4/12a8ad0d67ef469e86b2e04610862788 [2022-12-14 05:00:23,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:00:23,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:00:23,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:00:23,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:00:23,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:00:23,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614b61a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23, skipping insertion in model container [2022-12-14 05:00:23,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:00:23,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:00:23,737 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_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/sv-benchmarks/c/loops/heavy-1.c[600,613] [2022-12-14 05:00:23,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:00:23,778 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:00:23,790 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_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/sv-benchmarks/c/loops/heavy-1.c[600,613] [2022-12-14 05:00:23,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:00:23,824 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:00:23,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23 WrapperNode [2022-12-14 05:00:23,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:00:23,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:00:23,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:00:23,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:00:23,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,847 INFO L138 Inliner]: procedures = 12, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-12-14 05:00:23,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:00:23,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:00:23,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:00:23,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:00:23,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:00:23,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:00:23,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:00:23,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:00:23,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (1/1) ... [2022-12-14 05:00:23,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:00:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:23,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:00:23,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:00:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 05:00:23,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:00:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:00:23,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:00:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 05:00:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:00:23,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-14 05:00:23,987 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:00:23,988 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:00:24,071 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:00:24,092 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:00:24,092 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 05:00:24,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:00:24 BoogieIcfgContainer [2022-12-14 05:00:24,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:00:24,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:00:24,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:00:24,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:00:24,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:00:23" (1/3) ... [2022-12-14 05:00:24,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0d7dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:00:24, skipping insertion in model container [2022-12-14 05:00:24,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:00:23" (2/3) ... [2022-12-14 05:00:24,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c0d7dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:00:24, skipping insertion in model container [2022-12-14 05:00:24,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:00:24" (3/3) ... [2022-12-14 05:00:24,100 INFO L112 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-12-14 05:00:24,113 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:00:24,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:00:24,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:00:24,148 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;@5b86c529, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:00:24,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:00:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-12-14 05:00:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:00:24,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:24,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:00:24,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:24,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2496104, now seen corresponding path program 1 times [2022-12-14 05:00:24,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:24,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684408340] [2022-12-14 05:00:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:00:24,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:24,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684408340] [2022-12-14 05:00:24,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684408340] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:24,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:00:24,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:00:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171308978] [2022-12-14 05:00:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:00:24,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:00:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,325 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-12-14 05:00:24,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:24,358 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-12-14 05:00:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:00:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-12-14 05:00:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:24,366 INFO L225 Difference]: With dead ends: 17 [2022-12-14 05:00:24,366 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 05:00:24,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,370 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:24,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 05:00:24,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2022-12-14 05:00:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-12-14 05:00:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2022-12-14 05:00:24,392 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2022-12-14 05:00:24,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:24,392 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2022-12-14 05:00:24,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-12-14 05:00:24,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2022-12-14 05:00:24,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:00:24,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:24,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:00:24,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:00:24,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:24,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:24,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1936420166, now seen corresponding path program 1 times [2022-12-14 05:00:24,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:24,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272842248] [2022-12-14 05:00:24,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:00:24,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272842248] [2022-12-14 05:00:24,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272842248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:24,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:00:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:00:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710281331] [2022-12-14 05:00:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:24,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:00:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:00:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,452 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 05:00:24,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:24,474 INFO L93 Difference]: Finished difference Result 16 states and 22 transitions. [2022-12-14 05:00:24,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:00:24,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-14 05:00:24,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:24,475 INFO L225 Difference]: With dead ends: 16 [2022-12-14 05:00:24,475 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 05:00:24,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,476 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:24,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:24,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 05:00:24,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-12-14 05:00:24,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-12-14 05:00:24,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-12-14 05:00:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:24,479 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-12-14 05:00:24,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-12-14 05:00:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-12-14 05:00:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:00:24,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:24,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:00:24,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:00:24,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2032239394, now seen corresponding path program 1 times [2022-12-14 05:00:24,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:24,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018342478] [2022-12-14 05:00:24,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:24,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:00:24,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:24,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018342478] [2022-12-14 05:00:24,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018342478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:00:24,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:00:24,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:00:24,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659789426] [2022-12-14 05:00:24,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:00:24,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:00:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:00:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,533 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:24,549 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2022-12-14 05:00:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:00:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:00:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:24,550 INFO L225 Difference]: With dead ends: 17 [2022-12-14 05:00:24,550 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 05:00:24,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:00:24,551 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:24,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 05:00:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 05:00:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 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) [2022-12-14 05:00:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 05:00:24,553 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 8 [2022-12-14 05:00:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:24,554 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 05:00:24,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 05:00:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:00:24,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:24,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:00:24,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:00:24,554 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1594945054, now seen corresponding path program 1 times [2022-12-14 05:00:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:24,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888647837] [2022-12-14 05:00:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:24,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:00:24,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888647837] [2022-12-14 05:00:24,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888647837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:24,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523831180] [2022-12-14 05:00:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:24,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:24,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:24,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:24,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:00:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:00:24,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:00:24,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:00:24,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523831180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:24,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [560330891] [2022-12-14 05:00:24,798 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:00:24,798 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:24,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:24,806 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:24,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:24,883 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 25 [2022-12-14 05:00:24,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122 [2022-12-14 05:00:25,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:25,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 527 treesize of output 505 [2022-12-14 05:00:25,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:25,609 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:00:25,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:00:25,845 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:25,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:26,059 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:26,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:26,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:26,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '205#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:26,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:26,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:26,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 05:00:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250865725] [2022-12-14 05:00:26,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:26,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:00:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:26,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:00:26,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-14 05:00:26,277 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:26,429 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2022-12-14 05:00:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 05:00:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:00:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:26,430 INFO L225 Difference]: With dead ends: 31 [2022-12-14 05:00:26,430 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 05:00:26,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:00:26,432 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:26,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:00:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 05:00:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 05:00:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-12-14 05:00:26,436 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 9 [2022-12-14 05:00:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:26,437 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-12-14 05:00:26,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-12-14 05:00:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 05:00:26,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:26,437 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:00:26,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:00:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:26,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1215888474, now seen corresponding path program 2 times [2022-12-14 05:00:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:26,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368581905] [2022-12-14 05:00:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 05:00:26,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:26,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368581905] [2022-12-14 05:00:26,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368581905] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:26,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799435181] [2022-12-14 05:00:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:00:26,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:26,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:26,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:00:27,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 05:00:27,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:00:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:00:27,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 05:00:27,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 05:00:27,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799435181] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131854473] [2022-12-14 05:00:27,092 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:00:27,092 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:27,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:27,093 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:27,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:27,108 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 25 [2022-12-14 05:00:27,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 185 [2022-12-14 05:00:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:27,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 615 treesize of output 593 [2022-12-14 05:00:27,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:27,465 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:00:27,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:00:27,599 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:27,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:27,773 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:27,871 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:28,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:28,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:28,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:28,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-12-14 05:00:28,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328693280] [2022-12-14 05:00:28,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:28,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:00:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:00:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:00:28,023 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:28,229 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2022-12-14 05:00:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 05:00:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 05:00:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:28,231 INFO L225 Difference]: With dead ends: 114 [2022-12-14 05:00:28,231 INFO L226 Difference]: Without dead ends: 93 [2022-12-14 05:00:28,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:00:28,232 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:28,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:00:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-14 05:00:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-12-14 05:00:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 92 states have internal predecessors, (113), 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) [2022-12-14 05:00:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-12-14 05:00:28,245 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 22 [2022-12-14 05:00:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:28,246 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-12-14 05:00:28,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-12-14 05:00:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-12-14 05:00:28,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:28,247 INFO L195 NwaCegarLoop]: trace histogram [48, 16, 16, 4, 4, 1, 1, 1, 1] [2022-12-14 05:00:28,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:00:28,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:28,449 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash -419899728, now seen corresponding path program 3 times [2022-12-14 05:00:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:28,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672277367] [2022-12-14 05:00:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 263 proven. 6 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2022-12-14 05:00:29,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672277367] [2022-12-14 05:00:29,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672277367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071162235] [2022-12-14 05:00:29,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:00:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:29,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:29,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:00:29,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:00:29,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:00:29,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:00:29,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 263 proven. 6 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2022-12-14 05:00:29,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 695 proven. 57 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2022-12-14 05:00:29,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071162235] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:29,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999317874] [2022-12-14 05:00:29,397 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:00:29,397 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:29,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:29,398 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:29,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:29,410 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 25 [2022-12-14 05:00:29,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 185 [2022-12-14 05:00:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:29,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 615 treesize of output 593 [2022-12-14 05:00:29,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:29,778 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:00:29,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:00:29,894 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:29,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:30,016 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:30,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:30,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:30,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1461#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:30,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:30,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:30,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 9] total 18 [2022-12-14 05:00:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982150474] [2022-12-14 05:00:30,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 05:00:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 05:00:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:00:30,596 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:32,377 INFO L93 Difference]: Finished difference Result 417 states and 628 transitions. [2022-12-14 05:00:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 05:00:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-12-14 05:00:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:32,380 INFO L225 Difference]: With dead ends: 417 [2022-12-14 05:00:32,380 INFO L226 Difference]: Without dead ends: 331 [2022-12-14 05:00:32,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 241 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=443, Invalid=1719, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 05:00:32,382 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:32,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 22 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:00:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-14 05:00:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 257. [2022-12-14 05:00:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.34765625) internal successors, (345), 256 states have internal predecessors, (345), 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) [2022-12-14 05:00:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2022-12-14 05:00:32,421 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 92 [2022-12-14 05:00:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:32,422 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2022-12-14 05:00:32,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:00:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2022-12-14 05:00:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-14 05:00:32,424 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:32,424 INFO L195 NwaCegarLoop]: trace histogram [80, 16, 16, 4, 4, 1, 1, 1, 1] [2022-12-14 05:00:32,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:00:32,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 05:00:32,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:32,627 INFO L85 PathProgramCache]: Analyzing trace with hash -228308688, now seen corresponding path program 4 times [2022-12-14 05:00:32,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014713273] [2022-12-14 05:00:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 806 proven. 36 refuted. 0 times theorem prover too weak. 3918 trivial. 0 not checked. [2022-12-14 05:00:33,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014713273] [2022-12-14 05:00:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014713273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348899833] [2022-12-14 05:00:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:00:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:33,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:33,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:00:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:00:33,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 1208 proven. 60 refuted. 0 times theorem prover too weak. 3492 trivial. 0 not checked. [2022-12-14 05:00:33,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 1233 proven. 10 refuted. 0 times theorem prover too weak. 3517 trivial. 0 not checked. [2022-12-14 05:00:33,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348899833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664009700] [2022-12-14 05:00:33,996 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:00:33,996 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:33,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:33,996 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:33,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:34,010 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 25 [2022-12-14 05:00:34,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122 [2022-12-14 05:00:34,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:34,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 527 treesize of output 505 [2022-12-14 05:00:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:34,383 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:00:34,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:00:34,501 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:34,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:34,609 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:34,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:34,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:35,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3606#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:35,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:35,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:35,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 16 [2022-12-14 05:00:35,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909883271] [2022-12-14 05:00:35,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:35,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:00:35,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:00:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:00:35,110 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-12-14 05:00:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:00:35,452 INFO L93 Difference]: Finished difference Result 514 states and 765 transitions. [2022-12-14 05:00:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:00:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 124 [2022-12-14 05:00:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:00:35,453 INFO L225 Difference]: With dead ends: 514 [2022-12-14 05:00:35,453 INFO L226 Difference]: Without dead ends: 269 [2022-12-14 05:00:35,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 342 SyntacticMatches, 22 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:00:35,454 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:00:35,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:00:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-14 05:00:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-12-14 05:00:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.078358208955224) internal successors, (289), 268 states have internal predecessors, (289), 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) [2022-12-14 05:00:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 289 transitions. [2022-12-14 05:00:35,481 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 289 transitions. Word has length 124 [2022-12-14 05:00:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:00:35,481 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 289 transitions. [2022-12-14 05:00:35,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2022-12-14 05:00:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 289 transitions. [2022-12-14 05:00:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-12-14 05:00:35,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:00:35,484 INFO L195 NwaCegarLoop]: trace histogram [224, 16, 16, 4, 4, 1, 1, 1, 1] [2022-12-14 05:00:35,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:00:35,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:35,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:00:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:00:35,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1070396208, now seen corresponding path program 5 times [2022-12-14 05:00:35,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:00:35,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861325602] [2022-12-14 05:00:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:00:35,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:00:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:00:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 28880 backedges. 3398 proven. 105 refuted. 0 times theorem prover too weak. 25377 trivial. 0 not checked. [2022-12-14 05:00:38,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:00:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861325602] [2022-12-14 05:00:38,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861325602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:00:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559002106] [2022-12-14 05:00:38,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:00:38,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:00:38,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:00:38,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:00:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:00:41,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-12-14 05:00:41,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:00:41,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 05:00:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:00:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 28880 backedges. 3398 proven. 105 refuted. 0 times theorem prover too weak. 25377 trivial. 0 not checked. [2022-12-14 05:00:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:00:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 28880 backedges. 3398 proven. 105 refuted. 0 times theorem prover too weak. 25377 trivial. 0 not checked. [2022-12-14 05:00:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559002106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:00:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [101480702] [2022-12-14 05:00:42,692 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:00:42,692 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:00:42,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:00:42,692 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:00:42,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:00:42,702 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 25 [2022-12-14 05:00:42,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 185 [2022-12-14 05:00:42,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:00:42,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 615 treesize of output 593 [2022-12-14 05:00:43,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:00:43,044 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:00:43,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:00:43,160 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:43,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:43,287 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:00:43,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:00:43,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:00:44,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6810#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:00:44,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:00:44,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:00:44,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-14 05:00:44,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013481763] [2022-12-14 05:00:44,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:00:44,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 05:00:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:00:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 05:00:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:00:44,312 INFO L87 Difference]: Start difference. First operand 269 states and 289 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 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) [2022-12-14 05:00:55,131 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 84 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:01:38,115 WARN L233 SmtUtils]: Spent 20.17s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:01:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:01:38,654 INFO L93 Difference]: Finished difference Result 776 states and 1071 transitions. [2022-12-14 05:01:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 05:01:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 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 268 [2022-12-14 05:01:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:01:38,656 INFO L225 Difference]: With dead ends: 776 [2022-12-14 05:01:38,656 INFO L226 Difference]: Without dead ends: 525 [2022-12-14 05:01:38,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 765 SyntacticMatches, 21 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=821, Invalid=1729, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 05:01:38,658 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:01:38,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 40 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 05:01:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-12-14 05:01:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2022-12-14 05:01:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.0400763358778626) internal successors, (545), 524 states have internal predecessors, (545), 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) [2022-12-14 05:01:38,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 545 transitions. [2022-12-14 05:01:38,748 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 545 transitions. Word has length 268 [2022-12-14 05:01:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:01:38,749 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 545 transitions. [2022-12-14 05:01:38,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 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) [2022-12-14 05:01:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 545 transitions. [2022-12-14 05:01:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-12-14 05:01:38,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:01:38,756 INFO L195 NwaCegarLoop]: trace histogram [480, 16, 16, 4, 4, 1, 1, 1, 1] [2022-12-14 05:01:38,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:01:38,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:38,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:01:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:01:38,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2093093680, now seen corresponding path program 6 times [2022-12-14 05:01:38,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:01:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347007707] [2022-12-14 05:01:38,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:01:38,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:01:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:01:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 122960 backedges. 14438 proven. 465 refuted. 0 times theorem prover too weak. 108057 trivial. 0 not checked. [2022-12-14 05:01:47,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:01:47,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347007707] [2022-12-14 05:01:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347007707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:01:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998670248] [2022-12-14 05:01:47,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:01:47,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:01:47,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:01:47,714 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:01:47,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:01:48,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:01:48,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:01:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 3536 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:01:48,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:01:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 122960 backedges. 46207 proven. 5916 refuted. 0 times theorem prover too weak. 70837 trivial. 0 not checked. [2022-12-14 05:01:49,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:01:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 122960 backedges. 46337 proven. 5786 refuted. 0 times theorem prover too weak. 70837 trivial. 0 not checked. [2022-12-14 05:01:49,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998670248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:01:49,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492546287] [2022-12-14 05:01:49,660 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:01:49,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:01:49,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:01:49,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:01:49,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:01:49,672 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 25 [2022-12-14 05:01:49,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 185 [2022-12-14 05:01:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:01:49,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 615 treesize of output 593 [2022-12-14 05:01:49,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:01:49,967 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:01:49,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:01:50,071 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:01:50,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:01:50,175 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:01:50,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:01:50,244 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:01:51,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12629#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:01:51,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:01:51,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:01:51,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12, 12] total 53 [2022-12-14 05:01:51,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413113387] [2022-12-14 05:01:51,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:01:51,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 05:01:51,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:01:51,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 05:01:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2819, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 05:01:51,602 INFO L87 Difference]: Start difference. First operand 525 states and 545 transitions. Second operand has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:02:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:02:22,101 INFO L93 Difference]: Finished difference Result 1824 states and 1951 transitions. [2022-12-14 05:02:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2022-12-14 05:02:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 524 [2022-12-14 05:02:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:02:22,105 INFO L225 Difference]: With dead ends: 1824 [2022-12-14 05:02:22,105 INFO L226 Difference]: Without dead ends: 1333 [2022-12-14 05:02:22,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1916 GetRequests, 1529 SyntacticMatches, 20 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52675 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=7961, Invalid=127831, Unknown=0, NotChecked=0, Total=135792 [2022-12-14 05:02:22,116 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 239 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5652 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 5660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:02:22,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 32 Invalid, 5660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5652 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-12-14 05:02:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-12-14 05:02:22,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1333. [2022-12-14 05:02:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 1.0337837837837838) internal successors, (1377), 1332 states have internal predecessors, (1377), 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) [2022-12-14 05:02:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1377 transitions. [2022-12-14 05:02:22,260 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1377 transitions. Word has length 524 [2022-12-14 05:02:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:02:22,260 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 1377 transitions. [2022-12-14 05:02:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.509433962264151) internal successors, (80), 53 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:02:22,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1377 transitions. [2022-12-14 05:02:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1333 [2022-12-14 05:02:22,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:02:22,290 INFO L195 NwaCegarLoop]: trace histogram [1240, 40, 40, 4, 4, 1, 1, 1, 1] [2022-12-14 05:02:22,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:02:22,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:02:22,491 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:02:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:02:22,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1380387248, now seen corresponding path program 7 times [2022-12-14 05:02:22,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:02:22,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374948240] [2022-12-14 05:02:22,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:02:22,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:02:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:02:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 819516 backedges. 39983 proven. 496 refuted. 0 times theorem prover too weak. 779037 trivial. 0 not checked. [2022-12-14 05:02:51,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:02:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374948240] [2022-12-14 05:02:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374948240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:02:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598082523] [2022-12-14 05:02:51,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:02:51,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:02:51,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:02:51,235 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:02:51,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:02:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:02:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 9000 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 05:02:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:02:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 819516 backedges. 307567 proven. 46421 refuted. 0 times theorem prover too weak. 465528 trivial. 0 not checked. [2022-12-14 05:02:54,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:02:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 819516 backedges. 307798 proven. 46190 refuted. 0 times theorem prover too weak. 465528 trivial. 0 not checked. [2022-12-14 05:02:56,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598082523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:02:56,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085325507] [2022-12-14 05:02:56,027 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 05:02:56,027 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:02:56,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:02:56,027 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:02:56,027 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:02:56,036 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 25 [2022-12-14 05:02:56,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122 [2022-12-14 05:02:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:02:56,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 527 treesize of output 505 [2022-12-14 05:02:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:02:56,344 INFO L321 Elim1Store]: treesize reduction 84, result has 55.6 percent of original size [2022-12-14 05:02:56,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 177 treesize of output 146 [2022-12-14 05:02:56,489 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:02:56,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:02:56,604 INFO L321 Elim1Store]: treesize reduction 156, result has 50.2 percent of original size [2022-12-14 05:02:56,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 177 treesize of output 198 [2022-12-14 05:02:56,664 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:03:00,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27628#(and (= |ULTIMATE.start_main_~a~0#1| 1) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |~#array~0.offset| 0) (= 4 |~#array~0.base|) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 1048576)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 05:03:00,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:03:00,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:03:00,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24, 24] total 78 [2022-12-14 05:03:00,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89815728] [2022-12-14 05:03:00,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:03:00,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-14 05:03:00,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:03:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-14 05:03:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=5760, Unknown=0, NotChecked=0, Total=6480 [2022-12-14 05:03:00,267 INFO L87 Difference]: Start difference. First operand 1333 states and 1377 transitions. Second operand has 78 states, 78 states have (on average 1.6538461538461537) internal successors, (129), 78 states have internal predecessors, (129), 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) [2022-12-14 05:11:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:11:58,712 INFO L93 Difference]: Finished difference Result 4303 states and 4574 transitions. [2022-12-14 05:11:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 739 states. [2022-12-14 05:11:58,713 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6538461538461537) internal successors, (129), 78 states have internal predecessors, (129), 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 1332 [2022-12-14 05:11:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:11:58,718 INFO L225 Difference]: With dead ends: 4303 [2022-12-14 05:11:58,718 INFO L226 Difference]: Without dead ends: 3005 [2022-12-14 05:11:58,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4741 GetRequests, 3905 SyntacticMatches, 44 SemanticMatches, 792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272350 ImplicationChecksByTransitivity, 523.1s TimeCoverageRelationStatistics Valid=35212, Invalid=594429, Unknown=1, NotChecked=0, Total=629642 [2022-12-14 05:11:58,748 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 417 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 17516 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 17533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 17516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:11:58,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 140 Invalid, 17533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 17516 Invalid, 0 Unknown, 0 Unchecked, 20.0s Time] [2022-12-14 05:11:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2022-12-14 05:11:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 3005. [2022-12-14 05:11:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 3004 states have (on average 1.030958721704394) internal successors, (3097), 3004 states have internal predecessors, (3097), 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) [2022-12-14 05:11:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3097 transitions. [2022-12-14 05:11:59,139 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3097 transitions. Word has length 1332 [2022-12-14 05:11:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:11:59,140 INFO L495 AbstractCegarLoop]: Abstraction has 3005 states and 3097 transitions. [2022-12-14 05:11:59,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6538461538461537) internal successors, (129), 78 states have internal predecessors, (129), 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) [2022-12-14 05:11:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3097 transitions. [2022-12-14 05:11:59,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3005 [2022-12-14 05:11:59,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:11:59,190 INFO L195 NwaCegarLoop]: trace histogram [2816, 88, 88, 4, 4, 1, 1, 1, 1] [2022-12-14 05:11:59,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:11:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:11:59,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:11:59,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:11:59,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1056759408, now seen corresponding path program 8 times [2022-12-14 05:11:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:11:59,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518026310] [2022-12-14 05:11:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:11:59,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:12:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:13:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4219352 backedges. 94838 proven. 528 refuted. 0 times theorem prover too weak. 4123986 trivial. 0 not checked. [2022-12-14 05:13:44,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:13:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518026310] [2022-12-14 05:13:44,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518026310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:13:44,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480833246] [2022-12-14 05:13:44,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:13:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:44,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:44,963 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:44,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4a7cd50-af1d-4267-835e-6ac8daa2b88e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process