./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.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_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/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_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/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_dea61939-cecd-4718-aae1-1269e26c3d5e/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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- 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 06:14:35,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:14:35,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:14:35,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:14:35,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:14:35,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:14:35,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:14:35,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:14:35,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:14:35,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:14:35,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:14:35,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:14:35,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:14:35,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:14:35,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:14:35,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:14:35,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:14:35,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:14:35,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:14:35,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:14:35,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:14:35,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:14:35,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:14:35,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:14:35,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:14:35,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:14:35,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:14:35,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:14:35,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:14:35,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:14:35,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:14:35,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:14:35,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:14:35,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:14:35,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:14:35,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:14:35,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:14:35,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:14:35,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:14:35,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:14:35,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:14:35,190 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:14:35,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:14:35,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:14:35,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:14:35,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:14:35,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:14:35,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:14:35,206 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:14:35,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:14:35,206 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:14:35,207 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:14:35,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:14:35,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:14:35,208 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:14:35,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:14:35,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:14:35,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:14:35,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:14:35,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:14:35,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:14:35,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:14:35,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:14:35,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:14:35,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:14:35,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:14:35,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:14:35,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:14:35,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:14:35,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:14:35,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:14:35,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:14:35,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:14:35,212 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_dea61939-cecd-4718-aae1-1269e26c3d5e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2022-12-14 06:14:35,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:14:35,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:14:35,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:14:35,401 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:14:35,402 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:14:35,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-12-14 06:14:37,962 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:14:38,122 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:14:38,123 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/sv-benchmarks/c/loops-crafted-1/in-de52.c [2022-12-14 06:14:38,128 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/data/aec9a792f/6011e794b9984863bb2077df8ab865a7/FLAGc0b8f1bfc [2022-12-14 06:14:38,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/data/aec9a792f/6011e794b9984863bb2077df8ab865a7 [2022-12-14 06:14:38,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:14:38,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:14:38,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:14:38,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:14:38,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:14:38,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34018f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38, skipping insertion in model container [2022-12-14 06:14:38,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:14:38,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:14:38,678 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_dea61939-cecd-4718-aae1-1269e26c3d5e/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-12-14 06:14:38,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:14:38,695 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:14:38,703 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_dea61939-cecd-4718-aae1-1269e26c3d5e/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2022-12-14 06:14:38,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:14:38,715 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:14:38,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38 WrapperNode [2022-12-14 06:14:38,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:14:38,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:14:38,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:14:38,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:14:38,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,738 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-12-14 06:14:38,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:14:38,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:14:38,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:14:38,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:14:38,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,751 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:14:38,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:14:38,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:14:38,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:14:38,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (1/1) ... [2022-12-14 06:14:38,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:14:38,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:38,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:14:38,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:14:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:14:38,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:14:38,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:14:38,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:14:38,864 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:14:38,865 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:14:38,968 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:14:38,996 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:14:38,996 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 06:14:38,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:14:38 BoogieIcfgContainer [2022-12-14 06:14:38,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:14:39,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:14:39,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:14:39,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:14:39,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:14:38" (1/3) ... [2022-12-14 06:14:39,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15424c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:14:39, skipping insertion in model container [2022-12-14 06:14:39,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:14:38" (2/3) ... [2022-12-14 06:14:39,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15424c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:14:39, skipping insertion in model container [2022-12-14 06:14:39,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:14:38" (3/3) ... [2022-12-14 06:14:39,008 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2022-12-14 06:14:39,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:14:39,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:14:39,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:14:39,081 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;@25491d0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:14:39,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:14:39,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 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 06:14:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 06:14:39,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:39,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:39,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:39,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1375234513, now seen corresponding path program 1 times [2022-12-14 06:14:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:39,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124320300] [2022-12-14 06:14:39,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,337 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 06:14:39,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124320300] [2022-12-14 06:14:39,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124320300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:39,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:39,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:14:39,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786102224] [2022-12-14 06:14:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:39,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:14:39,378 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:14:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:39,453 INFO L93 Difference]: Finished difference Result 27 states and 40 transitions. [2022-12-14 06:14:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:14:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:14:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:39,463 INFO L225 Difference]: With dead ends: 27 [2022-12-14 06:14:39,464 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 06:14:39,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:14:39,469 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:39,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 11 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 06:14:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 06:14:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-12-14 06:14:39,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-12-14 06:14:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:39,496 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-12-14 06:14:39,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:14:39,496 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-12-14 06:14:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:14:39,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:39,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:14:39,497 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash -348037811, now seen corresponding path program 1 times [2022-12-14 06:14:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:39,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640177744] [2022-12-14 06:14:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,530 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 06:14:39,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640177744] [2022-12-14 06:14:39,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640177744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:39,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:14:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552396798] [2022-12-14 06:14:39,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:39,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:14:39,534 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:39,564 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-12-14 06:14:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:14:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:39,566 INFO L225 Difference]: With dead ends: 24 [2022-12-14 06:14:39,566 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 06:14:39,566 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 06:14:39,568 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 06:14:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 06:14:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2022-12-14 06:14:39,578 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 9 [2022-12-14 06:14:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:39,578 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2022-12-14 06:14:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2022-12-14 06:14:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 06:14:39,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:39,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 06:14:39,580 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -318217020, now seen corresponding path program 1 times [2022-12-14 06:14:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313722260] [2022-12-14 06:14:39,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,621 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 06:14:39,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:39,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313722260] [2022-12-14 06:14:39,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313722260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:39,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:39,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:14:39,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145294605] [2022-12-14 06:14:39,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:39,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:14:39,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:39,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:14:39,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:14:39,625 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:39,662 INFO L93 Difference]: Finished difference Result 30 states and 45 transitions. [2022-12-14 06:14:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:14:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 06:14:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:39,663 INFO L225 Difference]: With dead ends: 30 [2022-12-14 06:14:39,663 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 06:14:39,664 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 06:14:39,665 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:39,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 06:14:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-14 06:14:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 06:14:39,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-12-14 06:14:39,676 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 9 [2022-12-14 06:14:39,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:39,677 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-12-14 06:14:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-12-14 06:14:39,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:14:39,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:39,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:39,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 06:14:39,678 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:39,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:39,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1648731585, now seen corresponding path program 1 times [2022-12-14 06:14:39,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:39,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196096607] [2022-12-14 06:14:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:39,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:39,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196096607] [2022-12-14 06:14:39,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196096607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:14:39,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:14:39,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:14:39,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254371507] [2022-12-14 06:14:39,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:39,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:39,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:14:39,754 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 06:14:39,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:39,791 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-12-14 06:14:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:14:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:14:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:39,792 INFO L225 Difference]: With dead ends: 29 [2022-12-14 06:14:39,793 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 06:14:39,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:14:39,794 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:39,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 06:14:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 06:14:39,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-12-14 06:14:39,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 10 [2022-12-14 06:14:39,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:39,803 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-12-14 06:14:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 06:14:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-12-14 06:14:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:14:39,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:39,804 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:39,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 06:14:39,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 293445696, now seen corresponding path program 1 times [2022-12-14 06:14:39,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616318130] [2022-12-14 06:14:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:39,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616318130] [2022-12-14 06:14:39,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616318130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:39,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009444283] [2022-12-14 06:14:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:39,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:39,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:39,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:14:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:39,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:14:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:40,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:40,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009444283] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:40,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:14:40,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 06:14:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484788803] [2022-12-14 06:14:40,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:40,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:40,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:14:40,032 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 06:14:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:40,061 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2022-12-14 06:14:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:14:40,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:14:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:40,062 INFO L225 Difference]: With dead ends: 25 [2022-12-14 06:14:40,062 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 06:14:40,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:14:40,063 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:40,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 06:14:40,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 06:14:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2022-12-14 06:14:40,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 11 [2022-12-14 06:14:40,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:40,068 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2022-12-14 06:14:40,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 06:14:40,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2022-12-14 06:14:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:14:40,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:40,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:40,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:40,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:40,270 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1561513362, now seen corresponding path program 1 times [2022-12-14 06:14:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:40,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001154052] [2022-12-14 06:14:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:40,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:40,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:40,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001154052] [2022-12-14 06:14:40,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001154052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660390557] [2022-12-14 06:14:40,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:40,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:40,432 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:40,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:14:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:40,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:14:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:40,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:40,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660390557] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:40,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:14:40,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 8 [2022-12-14 06:14:40,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865824166] [2022-12-14 06:14:40,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:14:40,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:40,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:14:40,523 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 06:14:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:40,552 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-12-14 06:14:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:14:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:14:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:40,553 INFO L225 Difference]: With dead ends: 20 [2022-12-14 06:14:40,553 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 06:14:40,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:14:40,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:40,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 06:14:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 06:14:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-12-14 06:14:40,559 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2022-12-14 06:14:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:40,559 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-12-14 06:14:40,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 06:14:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-12-14 06:14:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:14:40,560 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:40,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:40,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:40,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:14:40,762 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash 215866139, now seen corresponding path program 1 times [2022-12-14 06:14:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:40,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168163459] [2022-12-14 06:14:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:40,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:40,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168163459] [2022-12-14 06:14:40,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168163459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:40,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456879289] [2022-12-14 06:14:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:40,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:40,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:40,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:40,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:14:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 06:14:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:14:41,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:41,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456879289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069566778] [2022-12-14 06:14:41,245 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:41,245 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:41,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:41,254 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:41,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:41,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:41,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '702#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:41,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:41,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:41,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-12-14 06:14:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68139517] [2022-12-14 06:14:41,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:41,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 06:14:41,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 06:14:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:14:41,540 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 06:14:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:41,787 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-12-14 06:14:41,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:14:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 12 [2022-12-14 06:14:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:41,789 INFO L225 Difference]: With dead ends: 51 [2022-12-14 06:14:41,790 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 06:14:41,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:14:41,791 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:41,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 06:14:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-12-14 06:14:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-12-14 06:14:41,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-12-14 06:14:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:41,802 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-12-14 06:14:41,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 06:14:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-12-14 06:14:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:14:41,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:41,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:41,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:14:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 06:14:42,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash 245686930, now seen corresponding path program 1 times [2022-12-14 06:14:42,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:42,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296316849] [2022-12-14 06:14:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:42,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296316849] [2022-12-14 06:14:42,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296316849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:42,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644923859] [2022-12-14 06:14:42,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:42,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:42,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:42,091 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:42,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:14:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:14:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:42,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:42,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644923859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [705017268] [2022-12-14 06:14:42,186 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:42,187 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:42,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:42,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:42,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:42,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:42,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '925#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:42,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:42,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:42,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 06:14:42,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703820814] [2022-12-14 06:14:42,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:42,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:42,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:14:42,367 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 06:14:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:42,406 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-12-14 06:14:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:14:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 06:14:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:42,407 INFO L225 Difference]: With dead ends: 40 [2022-12-14 06:14:42,408 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 06:14:42,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:14:42,409 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:42,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 06:14:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-12-14 06:14:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 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 06:14:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2022-12-14 06:14:42,422 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 12 [2022-12-14 06:14:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:42,422 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2022-12-14 06:14:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 06:14:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2022-12-14 06:14:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:14:42,422 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:42,423 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:42,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:14:42,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:42,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash 338438034, now seen corresponding path program 1 times [2022-12-14 06:14:42,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:42,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572737623] [2022-12-14 06:14:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:42,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:14:42,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572737623] [2022-12-14 06:14:42,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572737623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:42,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308849245] [2022-12-14 06:14:42,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:42,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:42,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:42,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:14:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:42,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:14:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:14:42,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:14:42,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308849245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:42,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804883028] [2022-12-14 06:14:42,795 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:42,795 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:42,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:42,795 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:42,796 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:42,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:42,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1145#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:42,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:42,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:42,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 06:14:42,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888975289] [2022-12-14 06:14:42,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:42,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:14:42,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:14:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:14:42,949 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:42,986 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-12-14 06:14:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:14:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 06:14:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:42,987 INFO L225 Difference]: With dead ends: 41 [2022-12-14 06:14:42,988 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 06:14:42,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:14:42,989 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:42,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 06:14:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 06:14:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 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 06:14:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2022-12-14 06:14:42,998 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 14 [2022-12-14 06:14:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:42,998 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2022-12-14 06:14:42,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2022-12-14 06:14:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 06:14:42,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:42,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:43,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:14:43,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:43,200 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash -890380223, now seen corresponding path program 2 times [2022-12-14 06:14:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738724808] [2022-12-14 06:14:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:43,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:14:43,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738724808] [2022-12-14 06:14:43,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738724808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:43,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677448991] [2022-12-14 06:14:43,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:43,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:43,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:43,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:43,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:14:43,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:14:43,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:14:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:14:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 06:14:43,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677448991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835275043] [2022-12-14 06:14:43,437 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:43,437 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:43,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:43,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:43,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:43,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:43,654 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:43,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:43,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:43,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 15 [2022-12-14 06:14:43,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961228687] [2022-12-14 06:14:43,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:43,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:14:43,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:43,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:14:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:14:43,656 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 06:14:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:43,947 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-12-14 06:14:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:14:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 06:14:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:43,948 INFO L225 Difference]: With dead ends: 78 [2022-12-14 06:14:43,948 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 06:14:43,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:14:43,949 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:43,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:14:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 06:14:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-12-14 06:14:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 59 transitions. [2022-12-14 06:14:43,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 59 transitions. Word has length 14 [2022-12-14 06:14:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:43,958 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 59 transitions. [2022-12-14 06:14:43,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 06:14:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 59 transitions. [2022-12-14 06:14:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:14:43,959 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:43,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:43,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:14:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:14:44,160 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2065060851, now seen corresponding path program 3 times [2022-12-14 06:14:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:44,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205207052] [2022-12-14 06:14:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:44,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205207052] [2022-12-14 06:14:44,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205207052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432354862] [2022-12-14 06:14:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:14:44,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:44,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:14:44,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:14:44,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:14:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:14:44,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:14:44,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432354862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:44,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522155971] [2022-12-14 06:14:44,372 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:44,372 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:44,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:44,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:44,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:44,459 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:44,555 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1686#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:44,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:44,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:44,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2022-12-14 06:14:44,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029950796] [2022-12-14 06:14:44,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:44,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:14:44,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:44,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:14:44,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:14:44,557 INFO L87 Difference]: Start difference. First operand 40 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 06:14:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:44,961 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-12-14 06:14:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 06:14:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15 [2022-12-14 06:14:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:44,962 INFO L225 Difference]: With dead ends: 73 [2022-12-14 06:14:44,962 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 06:14:44,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 06:14:44,964 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:44,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 37 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:44,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 06:14:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-12-14 06:14:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 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 06:14:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2022-12-14 06:14:44,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 15 [2022-12-14 06:14:44,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:44,978 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2022-12-14 06:14:44,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 06:14:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2022-12-14 06:14:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:14:44,978 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:44,978 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:44,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:14:45,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:45,179 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash -203886368, now seen corresponding path program 2 times [2022-12-14 06:14:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:45,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000329440] [2022-12-14 06:14:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:45,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:45,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000329440] [2022-12-14 06:14:45,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000329440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:45,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957609471] [2022-12-14 06:14:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:45,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:45,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:45,372 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:14:45,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:14:45,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:14:45,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:45,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:45,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957609471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [979528745] [2022-12-14 06:14:45,604 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:45,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:45,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:45,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:45,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:45,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:45,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2061#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:45,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:45,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:45,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-12-14 06:14:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697437868] [2022-12-14 06:14:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:45,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:14:45,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:45,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:14:45,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:14:45,820 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 06:14:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:46,840 INFO L93 Difference]: Finished difference Result 139 states and 191 transitions. [2022-12-14 06:14:46,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 06:14:46,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 15 [2022-12-14 06:14:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:46,841 INFO L225 Difference]: With dead ends: 139 [2022-12-14 06:14:46,841 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 06:14:46,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:14:46,844 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 105 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:46,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 124 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:14:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 06:14:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2022-12-14 06:14:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 67 states have internal predecessors, (96), 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 06:14:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 96 transitions. [2022-12-14 06:14:46,860 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 96 transitions. Word has length 15 [2022-12-14 06:14:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:46,860 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 96 transitions. [2022-12-14 06:14:46,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 06:14:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2022-12-14 06:14:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 06:14:46,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:46,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:46,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:14:47,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 06:14:47,063 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:47,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1331253617, now seen corresponding path program 3 times [2022-12-14 06:14:47,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:47,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602846149] [2022-12-14 06:14:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:47,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:47,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602846149] [2022-12-14 06:14:47,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602846149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484777929] [2022-12-14 06:14:47,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:14:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:47,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:47,159 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:47,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:14:47,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:14:47,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:14:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:47,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:47,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484777929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753754029] [2022-12-14 06:14:47,263 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:47,263 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:47,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:47,263 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:47,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:47,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:47,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2600#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:47,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:47,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:47,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-12-14 06:14:47,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822061133] [2022-12-14 06:14:47,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:47,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:14:47,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:47,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:14:47,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:14:47,413 INFO L87 Difference]: Start difference. First operand 68 states and 96 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 06:14:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:47,496 INFO L93 Difference]: Finished difference Result 76 states and 104 transitions. [2022-12-14 06:14:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:14:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 16 [2022-12-14 06:14:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:47,497 INFO L225 Difference]: With dead ends: 76 [2022-12-14 06:14:47,497 INFO L226 Difference]: Without dead ends: 68 [2022-12-14 06:14:47,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:14:47,498 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:47,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 21 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:14:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-14 06:14:47,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-12-14 06:14:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.4029850746268657) internal successors, (94), 67 states have internal predecessors, (94), 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 06:14:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2022-12-14 06:14:47,521 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 16 [2022-12-14 06:14:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:47,522 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2022-12-14 06:14:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 06:14:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2022-12-14 06:14:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 06:14:47,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:47,522 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:47,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:14:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 06:14:47,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1268280200, now seen corresponding path program 2 times [2022-12-14 06:14:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:47,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85894516] [2022-12-14 06:14:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:14:47,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85894516] [2022-12-14 06:14:47,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85894516] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576883184] [2022-12-14 06:14:47,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:47,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:47,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:47,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:14:47,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:14:47,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:14:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:14:47,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:14:48,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576883184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:48,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282494289] [2022-12-14 06:14:48,086 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:48,087 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:48,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:48,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:48,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:48,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:48,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2997#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:48,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:48,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:48,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 19 [2022-12-14 06:14:48,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845007467] [2022-12-14 06:14:48,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:48,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 06:14:48,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:48,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 06:14:48,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-12-14 06:14:48,259 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:49,471 INFO L93 Difference]: Finished difference Result 154 states and 215 transitions. [2022-12-14 06:14:49,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 06:14:49,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 06:14:49,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:49,472 INFO L225 Difference]: With dead ends: 154 [2022-12-14 06:14:49,472 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 06:14:49,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=384, Invalid=2372, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 06:14:49,473 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 72 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:49,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:14:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 06:14:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2022-12-14 06:14:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 72 states have internal predecessors, (101), 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 06:14:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2022-12-14 06:14:49,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 17 [2022-12-14 06:14:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:49,498 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2022-12-14 06:14:49,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2022-12-14 06:14:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:14:49,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:49,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:49,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:14:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:49,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:49,701 INFO L85 PathProgramCache]: Analyzing trace with hash -237574949, now seen corresponding path program 4 times [2022-12-14 06:14:49,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370803349] [2022-12-14 06:14:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:49,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:49,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370803349] [2022-12-14 06:14:49,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370803349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753775483] [2022-12-14 06:14:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:14:49,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:49,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:49,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:14:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:14:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:14:49,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:14:49,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753775483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682099356] [2022-12-14 06:14:49,999 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:49,999 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:49,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:49,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:49,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:50,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:50,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3605#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:50,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:50,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:50,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-12-14 06:14:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898058225] [2022-12-14 06:14:50,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:14:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:14:50,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:14:50,156 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 06:14:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:51,205 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-12-14 06:14:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 06:14:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 18 [2022-12-14 06:14:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:51,206 INFO L225 Difference]: With dead ends: 138 [2022-12-14 06:14:51,206 INFO L226 Difference]: Without dead ends: 110 [2022-12-14 06:14:51,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 06:14:51,207 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 76 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:51,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 43 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:14:51,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-14 06:14:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2022-12-14 06:14:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.4069767441860466) internal successors, (121), 86 states have internal predecessors, (121), 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 06:14:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 121 transitions. [2022-12-14 06:14:51,232 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 121 transitions. Word has length 18 [2022-12-14 06:14:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:51,233 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 121 transitions. [2022-12-14 06:14:51,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 06:14:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 121 transitions. [2022-12-14 06:14:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:14:51,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:51,234 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:51,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 06:14:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:51,435 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1682342802, now seen corresponding path program 4 times [2022-12-14 06:14:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:51,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412735624] [2022-12-14 06:14:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:14:51,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412735624] [2022-12-14 06:14:51,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412735624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723939655] [2022-12-14 06:14:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:14:51,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:51,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:51,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:51,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:14:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:51,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:14:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:14:51,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:14:51,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723939655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:51,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1401725608] [2022-12-14 06:14:51,686 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:51,686 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:51,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:51,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:51,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:51,759 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:51,866 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4242#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:51,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:51,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:51,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2022-12-14 06:14:51,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305333620] [2022-12-14 06:14:51,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:51,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:14:51,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:51,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:14:51,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:14:51,867 INFO L87 Difference]: Start difference. First operand 87 states and 121 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 06:14:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:52,875 INFO L93 Difference]: Finished difference Result 187 states and 259 transitions. [2022-12-14 06:14:52,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 06:14:52,876 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 18 [2022-12-14 06:14:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:52,876 INFO L225 Difference]: With dead ends: 187 [2022-12-14 06:14:52,876 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 06:14:52,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=2562, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:14:52,877 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:52,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 108 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:14:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 06:14:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 98. [2022-12-14 06:14:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 97 states have internal predecessors, (131), 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 06:14:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 131 transitions. [2022-12-14 06:14:52,899 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 131 transitions. Word has length 18 [2022-12-14 06:14:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:52,900 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 131 transitions. [2022-12-14 06:14:52,900 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 06:14:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 131 transitions. [2022-12-14 06:14:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:14:52,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:52,900 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:52,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:53,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 06:14:53,102 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 117840877, now seen corresponding path program 3 times [2022-12-14 06:14:53,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:53,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803533485] [2022-12-14 06:14:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:53,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:14:53,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803533485] [2022-12-14 06:14:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803533485] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804888734] [2022-12-14 06:14:53,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:14:53,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:53,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:53,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:53,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:14:53,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:14:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:14:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:14:53,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 06:14:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804888734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1686878515] [2022-12-14 06:14:53,299 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:53,299 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:53,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:53,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:53,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:53,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:53,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4974#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:53,429 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:53,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:53,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-12-14 06:14:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645730847] [2022-12-14 06:14:53,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:53,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:14:53,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:53,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:14:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:14:53,430 INFO L87 Difference]: Start difference. First operand 98 states and 131 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:53,493 INFO L93 Difference]: Finished difference Result 109 states and 144 transitions. [2022-12-14 06:14:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:14:53,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 06:14:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:53,494 INFO L225 Difference]: With dead ends: 109 [2022-12-14 06:14:53,494 INFO L226 Difference]: Without dead ends: 91 [2022-12-14 06:14:53,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:14:53,494 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:53,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 15 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:14:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-14 06:14:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-12-14 06:14:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3555555555555556) internal successors, (122), 90 states have internal predecessors, (122), 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 06:14:53,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2022-12-14 06:14:53,515 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 19 [2022-12-14 06:14:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:53,515 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2022-12-14 06:14:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:14:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2022-12-14 06:14:53,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:14:53,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:53,516 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:53,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:53,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:14:53,717 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 375207377, now seen corresponding path program 5 times [2022-12-14 06:14:53,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:53,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469024387] [2022-12-14 06:14:53,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:53,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:53,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469024387] [2022-12-14 06:14:53,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469024387] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971264923] [2022-12-14 06:14:53,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:53,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:53,880 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:53,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:14:53,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:14:53,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:53,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:14:53,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:14:53,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:14:54,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971264923] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335546503] [2022-12-14 06:14:54,189 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:54,189 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:54,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:54,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:54,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:54,252 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:54,385 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5507#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:54,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:54,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:54,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 25 [2022-12-14 06:14:54,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774815986] [2022-12-14 06:14:54,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:54,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 06:14:54,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:54,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 06:14:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-12-14 06:14:54,386 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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 06:14:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:57,313 INFO L93 Difference]: Finished difference Result 231 states and 325 transitions. [2022-12-14 06:14:57,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 06:14:57,313 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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 20 [2022-12-14 06:14:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:57,315 INFO L225 Difference]: With dead ends: 231 [2022-12-14 06:14:57,315 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 06:14:57,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=857, Invalid=6115, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 06:14:57,318 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:57,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 182 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:14:57,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 06:14:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 99. [2022-12-14 06:14:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 98 states have internal predecessors, (141), 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 06:14:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 141 transitions. [2022-12-14 06:14:57,356 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 141 transitions. Word has length 20 [2022-12-14 06:14:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:57,356 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 141 transitions. [2022-12-14 06:14:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 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 06:14:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 141 transitions. [2022-12-14 06:14:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:14:57,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:57,356 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:57,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 06:14:57,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:57,557 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:14:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash 634759885, now seen corresponding path program 6 times [2022-12-14 06:14:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:14:57,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199382769] [2022-12-14 06:14:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:14:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:14:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:14:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:14:57,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:14:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199382769] [2022-12-14 06:14:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199382769] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793379523] [2022-12-14 06:14:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:14:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:57,735 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:57,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:14:57,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:14:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:57,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:14:57,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:14:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793379523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085490784] [2022-12-14 06:14:57,886 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:14:57,886 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:57,886 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:57,886 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:57,886 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:57,962 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:58,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6384#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:58,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:58,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:58,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-12-14 06:14:58,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767872395] [2022-12-14 06:14:58,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:58,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:14:58,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:14:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:14:58,075 INFO L87 Difference]: Start difference. First operand 99 states and 141 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 06:15:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:00,199 INFO L93 Difference]: Finished difference Result 204 states and 307 transitions. [2022-12-14 06:15:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 06:15:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 21 [2022-12-14 06:15:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:00,200 INFO L225 Difference]: With dead ends: 204 [2022-12-14 06:15:00,200 INFO L226 Difference]: Without dead ends: 172 [2022-12-14 06:15:00,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=628, Invalid=5692, Unknown=0, NotChecked=0, Total=6320 [2022-12-14 06:15:00,201 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:00,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 73 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:15:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-14 06:15:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2022-12-14 06:15:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.434108527131783) internal successors, (185), 129 states have internal predecessors, (185), 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 06:15:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2022-12-14 06:15:00,235 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 21 [2022-12-14 06:15:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:00,235 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2022-12-14 06:15:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 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 06:15:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2022-12-14 06:15:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:15:00,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:00,236 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:00,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 06:15:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:00,437 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:00,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1810180064, now seen corresponding path program 5 times [2022-12-14 06:15:00,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:00,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420105930] [2022-12-14 06:15:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:00,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:15:00,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420105930] [2022-12-14 06:15:00,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420105930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:00,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387691708] [2022-12-14 06:15:00,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:00,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:00,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:00,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 06:15:00,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:15:00,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:15:00,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:15:00,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:15:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387691708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945202075] [2022-12-14 06:15:00,833 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:00,833 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:00,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:00,833 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:00,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:00,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:01,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7298#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:01,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:01,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:01,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 6] total 23 [2022-12-14 06:15:01,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650923314] [2022-12-14 06:15:01,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:01,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:15:01,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:01,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:15:01,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:15:01,025 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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 06:15:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:02,013 INFO L93 Difference]: Finished difference Result 287 states and 397 transitions. [2022-12-14 06:15:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 06:15:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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 21 [2022-12-14 06:15:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:02,014 INFO L225 Difference]: With dead ends: 287 [2022-12-14 06:15:02,014 INFO L226 Difference]: Without dead ends: 248 [2022-12-14 06:15:02,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=2956, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 06:15:02,015 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:02,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 284 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:15:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-14 06:15:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2022-12-14 06:15:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.3722627737226278) internal successors, (188), 137 states have internal predecessors, (188), 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 06:15:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2022-12-14 06:15:02,053 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 21 [2022-12-14 06:15:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:02,053 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2022-12-14 06:15:02,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 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 06:15:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2022-12-14 06:15:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:15:02,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:02,054 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:02,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:02,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:02,255 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash 34685810, now seen corresponding path program 4 times [2022-12-14 06:15:02,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:02,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012593624] [2022-12-14 06:15:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:15:02,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012593624] [2022-12-14 06:15:02,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012593624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855798107] [2022-12-14 06:15:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:15:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:02,355 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:02,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 06:15:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:15:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:15:02,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:15:02,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855798107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:02,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884132475] [2022-12-14 06:15:02,441 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:02,441 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:02,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:02,442 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:02,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:02,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:02,560 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8304#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:02,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:02,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:02,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-12-14 06:15:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146505930] [2022-12-14 06:15:02,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:02,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:15:02,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:15:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:15:02,561 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:02,701 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-12-14 06:15:02,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:15:02,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 06:15:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:02,702 INFO L225 Difference]: With dead ends: 154 [2022-12-14 06:15:02,702 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 06:15:02,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:15:02,703 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:02,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:15:02,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 06:15:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-12-14 06:15:02,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3546099290780143) internal successors, (191), 141 states have internal predecessors, (191), 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 06:15:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 191 transitions. [2022-12-14 06:15:02,742 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 191 transitions. Word has length 22 [2022-12-14 06:15:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:02,743 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 191 transitions. [2022-12-14 06:15:02,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:02,743 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 191 transitions. [2022-12-14 06:15:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 06:15:02,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:02,743 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:02,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 06:15:02,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:02,945 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:02,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:02,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1024223040, now seen corresponding path program 6 times [2022-12-14 06:15:02,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855657107] [2022-12-14 06:15:02,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:02,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:15:03,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855657107] [2022-12-14 06:15:03,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855657107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564588089] [2022-12-14 06:15:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:15:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:03,099 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:03,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 06:15:03,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:15:03,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:03,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:15:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:15:03,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:15:03,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564588089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:03,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284641623] [2022-12-14 06:15:03,229 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:03,229 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:03,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:03,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:03,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:03,291 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:03,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9048#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:03,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:03,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-12-14 06:15:03,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821538152] [2022-12-14 06:15:03,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:03,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:15:03,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:15:03,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-12-14 06:15:03,385 INFO L87 Difference]: Start difference. First operand 142 states and 191 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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 06:15:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:05,205 INFO L93 Difference]: Finished difference Result 226 states and 299 transitions. [2022-12-14 06:15:05,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 06:15:05,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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 23 [2022-12-14 06:15:05,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:05,206 INFO L225 Difference]: With dead ends: 226 [2022-12-14 06:15:05,206 INFO L226 Difference]: Without dead ends: 196 [2022-12-14 06:15:05,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=387, Invalid=3273, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 06:15:05,207 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 124 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:05,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:15:05,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-14 06:15:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2022-12-14 06:15:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 141 states have internal predecessors, (186), 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 06:15:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2022-12-14 06:15:05,248 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 23 [2022-12-14 06:15:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:05,248 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2022-12-14 06:15:05,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 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 06:15:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2022-12-14 06:15:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:15:05,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:05,249 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:05,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 06:15:05,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 06:15:05,451 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1182099342, now seen corresponding path program 5 times [2022-12-14 06:15:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:05,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544048257] [2022-12-14 06:15:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:05,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 06:15:05,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544048257] [2022-12-14 06:15:05,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544048257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093920148] [2022-12-14 06:15:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:05,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:05,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:05,613 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:05,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 06:15:05,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:15:05,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:15:05,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:15:05,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:15:05,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093920148] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:05,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1631914035] [2022-12-14 06:15:05,733 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:05,733 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:05,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:05,734 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:05,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:05,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:05,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:05,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:05,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:05,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-12-14 06:15:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498652892] [2022-12-14 06:15:05,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:05,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:15:05,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:05,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:15:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:15:05,889 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:06,046 INFO L93 Difference]: Finished difference Result 184 states and 244 transitions. [2022-12-14 06:15:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 06:15:06,046 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:15:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:06,047 INFO L225 Difference]: With dead ends: 184 [2022-12-14 06:15:06,047 INFO L226 Difference]: Without dead ends: 160 [2022-12-14 06:15:06,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:15:06,047 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:06,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:15:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-14 06:15:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2022-12-14 06:15:06,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 130 states have internal predecessors, (173), 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 06:15:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2022-12-14 06:15:06,091 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 24 [2022-12-14 06:15:06,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:06,091 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2022-12-14 06:15:06,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2022-12-14 06:15:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:15:06,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:06,092 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:06,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 06:15:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:06,293 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:06,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1390674277, now seen corresponding path program 7 times [2022-12-14 06:15:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229832217] [2022-12-14 06:15:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:06,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:15:06,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229832217] [2022-12-14 06:15:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229832217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335565631] [2022-12-14 06:15:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:15:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:06,567 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 06:15:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:06,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:15:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:15:06,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:15:06,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335565631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:06,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339645363] [2022-12-14 06:15:06,713 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:06,713 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:06,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:06,713 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:06,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:06,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:06,897 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10774#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:06,897 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:06,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2022-12-14 06:15:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158912744] [2022-12-14 06:15:06,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:06,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:15:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:15:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:15:06,899 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:12,078 INFO L93 Difference]: Finished difference Result 252 states and 355 transitions. [2022-12-14 06:15:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 06:15:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:15:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:12,079 INFO L225 Difference]: With dead ends: 252 [2022-12-14 06:15:12,079 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 06:15:12,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 06:15:12,081 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:12,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 89 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:15:12,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 06:15:12,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 170. [2022-12-14 06:15:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.3254437869822486) internal successors, (224), 169 states have internal predecessors, (224), 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 06:15:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 224 transitions. [2022-12-14 06:15:12,136 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 224 transitions. Word has length 24 [2022-12-14 06:15:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:12,136 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 224 transitions. [2022-12-14 06:15:12,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 224 transitions. [2022-12-14 06:15:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:15:12,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:12,137 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:12,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 06:15:12,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 06:15:12,338 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1967825816, now seen corresponding path program 7 times [2022-12-14 06:15:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:12,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225002713] [2022-12-14 06:15:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:15:12,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:12,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225002713] [2022-12-14 06:15:12,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225002713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:12,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659053735] [2022-12-14 06:15:12,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:15:12,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:12,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:12,529 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:12,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 06:15:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:15:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:15:12,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:15:12,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659053735] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750916800] [2022-12-14 06:15:12,708 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:12,708 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:12,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:12,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:12,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:12,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:12,909 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11918#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:12,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:12,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:12,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-12-14 06:15:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665668480] [2022-12-14 06:15:12,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:12,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:15:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:15:12,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:15:12,911 INFO L87 Difference]: Start difference. First operand 170 states and 224 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:17,900 INFO L93 Difference]: Finished difference Result 341 states and 454 transitions. [2022-12-14 06:15:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-14 06:15:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 06:15:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:17,901 INFO L225 Difference]: With dead ends: 341 [2022-12-14 06:15:17,901 INFO L226 Difference]: Without dead ends: 291 [2022-12-14 06:15:17,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=712, Invalid=7298, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 06:15:17,903 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 193 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:17,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 266 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 06:15:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-12-14 06:15:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 165. [2022-12-14 06:15:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 164 states have internal predecessors, (215), 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 06:15:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 215 transitions. [2022-12-14 06:15:17,961 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 215 transitions. Word has length 24 [2022-12-14 06:15:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:17,961 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 215 transitions. [2022-12-14 06:15:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 215 transitions. [2022-12-14 06:15:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:15:17,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:17,962 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:17,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:18,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:18,163 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:18,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1569464175, now seen corresponding path program 6 times [2022-12-14 06:15:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:18,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980583892] [2022-12-14 06:15:18,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:18,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:18,367 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:15:18,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:18,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980583892] [2022-12-14 06:15:18,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980583892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:18,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527293614] [2022-12-14 06:15:18,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:15:18,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:18,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:18,369 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:18,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 06:15:18,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:15:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:15:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 06:15:18,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 06:15:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527293614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954623935] [2022-12-14 06:15:18,529 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:18,529 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:18,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:18,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:18,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:18,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:18,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13195#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:18,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:18,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:18,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 15 [2022-12-14 06:15:18,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536491687] [2022-12-14 06:15:18,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 06:15:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:18,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 06:15:18,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-12-14 06:15:18,703 INFO L87 Difference]: Start difference. First operand 165 states and 215 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 06:15:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:19,137 INFO L93 Difference]: Finished difference Result 238 states and 316 transitions. [2022-12-14 06:15:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:15:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 26 [2022-12-14 06:15:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:19,138 INFO L225 Difference]: With dead ends: 238 [2022-12-14 06:15:19,138 INFO L226 Difference]: Without dead ends: 223 [2022-12-14 06:15:19,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-12-14 06:15:19,138 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:19,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:15:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-12-14 06:15:19,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2022-12-14 06:15:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.2897196261682242) internal successors, (276), 214 states have internal predecessors, (276), 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 06:15:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 276 transitions. [2022-12-14 06:15:19,214 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 276 transitions. Word has length 26 [2022-12-14 06:15:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:19,214 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 276 transitions. [2022-12-14 06:15:19,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 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 06:15:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 276 transitions. [2022-12-14 06:15:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:15:19,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:19,215 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:19,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:19,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:19,416 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:19,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1523111237, now seen corresponding path program 8 times [2022-12-14 06:15:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:19,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427482968] [2022-12-14 06:15:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:15:19,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:19,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427482968] [2022-12-14 06:15:19,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427482968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:19,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446162627] [2022-12-14 06:15:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:19,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:19,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:19,588 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 06:15:19,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:15:19,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:19,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 06:15:19,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:15:19,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:15:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446162627] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731918507] [2022-12-14 06:15:20,037 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:20,037 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:20,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:20,037 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:20,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:20,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:20,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14291#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:20,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:20,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:20,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 12] total 34 [2022-12-14 06:15:20,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088838933] [2022-12-14 06:15:20,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:20,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 06:15:20,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 06:15:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 06:15:20,247 INFO L87 Difference]: Start difference. First operand 215 states and 276 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 06:15:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:30,536 INFO L93 Difference]: Finished difference Result 520 states and 717 transitions. [2022-12-14 06:15:30,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-12-14 06:15:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 26 [2022-12-14 06:15:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:30,537 INFO L225 Difference]: With dead ends: 520 [2022-12-14 06:15:30,537 INFO L226 Difference]: Without dead ends: 446 [2022-12-14 06:15:30,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5599 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2110, Invalid=17630, Unknown=0, NotChecked=0, Total=19740 [2022-12-14 06:15:30,539 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 239 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 3231 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 3231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:30,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 398 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 3231 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 06:15:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-14 06:15:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 207. [2022-12-14 06:15:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.3640776699029127) internal successors, (281), 206 states have internal predecessors, (281), 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 06:15:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 281 transitions. [2022-12-14 06:15:30,660 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 281 transitions. Word has length 26 [2022-12-14 06:15:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:30,661 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 281 transitions. [2022-12-14 06:15:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 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 06:15:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 281 transitions. [2022-12-14 06:15:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:15:30,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:30,661 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:30,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 06:15:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 06:15:30,862 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:30,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 437082509, now seen corresponding path program 9 times [2022-12-14 06:15:30,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:30,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982238565] [2022-12-14 06:15:30,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:15:31,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982238565] [2022-12-14 06:15:31,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982238565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:31,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470053491] [2022-12-14 06:15:31,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:15:31,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:31,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:31,111 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:31,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 06:15:31,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:15:31,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:15:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:15:31,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:15:31,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470053491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:31,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [299768573] [2022-12-14 06:15:31,306 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:31,306 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:31,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:31,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:31,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:31,363 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:31,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16088#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:31,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:31,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:31,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-12-14 06:15:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543445999] [2022-12-14 06:15:31,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:31,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 06:15:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 06:15:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:15:31,499 INFO L87 Difference]: Start difference. First operand 207 states and 281 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 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 06:15:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:44,853 INFO L93 Difference]: Finished difference Result 361 states and 515 transitions. [2022-12-14 06:15:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 06:15:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 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 27 [2022-12-14 06:15:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:44,854 INFO L225 Difference]: With dead ends: 361 [2022-12-14 06:15:44,854 INFO L226 Difference]: Without dead ends: 310 [2022-12-14 06:15:44,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6294 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1534, Invalid=17926, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 06:15:44,855 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 214 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:44,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 99 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1970 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 06:15:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-14 06:15:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 219. [2022-12-14 06:15:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3394495412844036) internal successors, (292), 218 states have internal predecessors, (292), 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 06:15:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 292 transitions. [2022-12-14 06:15:44,963 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 292 transitions. Word has length 27 [2022-12-14 06:15:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:44,963 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 292 transitions. [2022-12-14 06:15:44,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 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 06:15:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 292 transitions. [2022-12-14 06:15:44,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 06:15:44,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:44,963 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:44,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:45,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 06:15:45,164 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -350086956, now seen corresponding path program 7 times [2022-12-14 06:15:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:45,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708477137] [2022-12-14 06:15:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:15:45,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708477137] [2022-12-14 06:15:45,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708477137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240634703] [2022-12-14 06:15:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:15:45,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:45,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:45,377 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:45,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 06:15:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 06:15:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 06:15:45,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 06:15:45,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240634703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:45,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743472602] [2022-12-14 06:15:45,596 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:45,596 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:45,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:45,597 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:45,597 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:45,660 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:45,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17638#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:45,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:45,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:45,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 8] total 26 [2022-12-14 06:15:45,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249406794] [2022-12-14 06:15:45,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:45,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 06:15:45,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:45,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 06:15:45,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-12-14 06:15:45,798 INFO L87 Difference]: Start difference. First operand 219 states and 292 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:47,047 INFO L93 Difference]: Finished difference Result 552 states and 740 transitions. [2022-12-14 06:15:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 06:15:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 06:15:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:47,050 INFO L225 Difference]: With dead ends: 552 [2022-12-14 06:15:47,050 INFO L226 Difference]: Without dead ends: 508 [2022-12-14 06:15:47,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 06:15:47,051 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 205 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:47,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 345 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:15:47,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-12-14 06:15:47,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 268. [2022-12-14 06:15:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.2771535580524345) internal successors, (341), 267 states have internal predecessors, (341), 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 06:15:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 341 transitions. [2022-12-14 06:15:47,183 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 341 transitions. Word has length 27 [2022-12-14 06:15:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:47,184 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 341 transitions. [2022-12-14 06:15:47,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 341 transitions. [2022-12-14 06:15:47,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:15:47,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:47,184 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:47,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:47,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:47,385 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:47,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2019234445, now seen corresponding path program 8 times [2022-12-14 06:15:47,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:47,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566522061] [2022-12-14 06:15:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:47,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:15:47,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566522061] [2022-12-14 06:15:47,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566522061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857643897] [2022-12-14 06:15:47,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:47,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:47,544 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:47,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 06:15:47,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:15:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:15:47,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:15:47,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:47,686 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:15:47,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857643897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:47,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271603730] [2022-12-14 06:15:47,688 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:47,688 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:47,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:47,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:47,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:47,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:47,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19429#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:47,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:47,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:47,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 10 [2022-12-14 06:15:47,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684344906] [2022-12-14 06:15:47,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:47,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:15:47,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:15:47,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:15:47,843 INFO L87 Difference]: Start difference. First operand 268 states and 341 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:48,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:48,090 INFO L93 Difference]: Finished difference Result 328 states and 421 transitions. [2022-12-14 06:15:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:15:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 06:15:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:48,091 INFO L225 Difference]: With dead ends: 328 [2022-12-14 06:15:48,091 INFO L226 Difference]: Without dead ends: 300 [2022-12-14 06:15:48,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:15:48,092 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:48,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:15:48,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-14 06:15:48,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2022-12-14 06:15:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.2823529411764707) internal successors, (327), 255 states have internal predecessors, (327), 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 06:15:48,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 327 transitions. [2022-12-14 06:15:48,228 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 327 transitions. Word has length 29 [2022-12-14 06:15:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:48,228 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 327 transitions. [2022-12-14 06:15:48,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 327 transitions. [2022-12-14 06:15:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:15:48,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:48,229 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:15:48,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 06:15:48,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:48,430 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170176, now seen corresponding path program 8 times [2022-12-14 06:15:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413829258] [2022-12-14 06:15:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:15:48,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:48,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413829258] [2022-12-14 06:15:48,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413829258] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:48,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662046380] [2022-12-14 06:15:48,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:48,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:48,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:48,620 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:48,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 06:15:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:15:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:15:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 06:15:48,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 06:15:49,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662046380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:49,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804527529] [2022-12-14 06:15:49,032 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:15:49,032 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:49,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:49,032 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:49,032 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:49,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:49,277 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20790#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:49,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:49,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:49,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 31 [2022-12-14 06:15:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996468721] [2022-12-14 06:15:49,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:15:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:15:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 06:15:49,278 INFO L87 Difference]: Start difference. First operand 256 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 06:16:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:07,243 INFO L93 Difference]: Finished difference Result 720 states and 964 transitions. [2022-12-14 06:16:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-12-14 06:16:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 06:16:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:07,247 INFO L225 Difference]: With dead ends: 720 [2022-12-14 06:16:07,247 INFO L226 Difference]: Without dead ends: 629 [2022-12-14 06:16:07,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9811 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2850, Invalid=26562, Unknown=0, NotChecked=0, Total=29412 [2022-12-14 06:16:07,249 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:07,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 292 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 06:16:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-12-14 06:16:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 277. [2022-12-14 06:16:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.3405797101449275) internal successors, (370), 276 states have internal predecessors, (370), 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 06:16:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 370 transitions. [2022-12-14 06:16:07,369 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 370 transitions. Word has length 29 [2022-12-14 06:16:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:07,369 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 370 transitions. [2022-12-14 06:16:07,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 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 06:16:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 370 transitions. [2022-12-14 06:16:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:16:07,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:07,370 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:07,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 06:16:07,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-14 06:16:07,571 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1166656526, now seen corresponding path program 10 times [2022-12-14 06:16:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981375711] [2022-12-14 06:16:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:07,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:16:07,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981375711] [2022-12-14 06:16:07,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981375711] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:16:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008492141] [2022-12-14 06:16:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:16:07,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:07,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:07,803 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:07,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 06:16:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:07,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 06:16:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:16:07,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 06:16:08,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008492141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874110015] [2022-12-14 06:16:08,099 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:16:08,099 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:16:08,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:16:08,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:16:08,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:16:08,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:16:08,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23235#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:16:08,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:16:08,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:16:08,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 10] total 30 [2022-12-14 06:16:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098659081] [2022-12-14 06:16:08,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:16:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:16:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:16:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 06:16:08,285 INFO L87 Difference]: Start difference. First operand 277 states and 370 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:11,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:11,896 INFO L93 Difference]: Finished difference Result 493 states and 655 transitions. [2022-12-14 06:16:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-14 06:16:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 06:16:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:11,897 INFO L225 Difference]: With dead ends: 493 [2022-12-14 06:16:11,897 INFO L226 Difference]: Without dead ends: 378 [2022-12-14 06:16:11,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=594, Invalid=6716, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 06:16:11,898 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1625 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:11,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 370 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:16:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-14 06:16:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 241. [2022-12-14 06:16:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.4) internal successors, (336), 240 states have internal predecessors, (336), 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 06:16:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 336 transitions. [2022-12-14 06:16:12,012 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 336 transitions. Word has length 29 [2022-12-14 06:16:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:12,012 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 336 transitions. [2022-12-14 06:16:12,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 336 transitions. [2022-12-14 06:16:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:16:12,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:12,013 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:12,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 06:16:12,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:12,213 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1102763941, now seen corresponding path program 11 times [2022-12-14 06:16:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280513989] [2022-12-14 06:16:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:16:12,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280513989] [2022-12-14 06:16:12,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280513989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:16:12,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375274633] [2022-12-14 06:16:12,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:16:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:12,434 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:12,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 06:16:12,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:16:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 06:16:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:16:12,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 06:16:12,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375274633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:12,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212258897] [2022-12-14 06:16:12,730 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:16:12,731 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:16:12,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:16:12,731 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:16:12,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:16:12,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:16:12,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24952#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:16:12,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:16:12,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:16:12,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-12-14 06:16:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826551692] [2022-12-14 06:16:12,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:16:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 06:16:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 06:16:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:16:12,905 INFO L87 Difference]: Start difference. First operand 241 states and 336 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:32,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:32,070 INFO L93 Difference]: Finished difference Result 409 states and 595 transitions. [2022-12-14 06:16:32,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-14 06:16:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-14 06:16:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:32,072 INFO L225 Difference]: With dead ends: 409 [2022-12-14 06:16:32,072 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 06:16:32,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=1330, Invalid=12242, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 06:16:32,073 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 109 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:32,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 84 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:16:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 06:16:32,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 291. [2022-12-14 06:16:32,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.3310344827586207) internal successors, (386), 290 states have internal predecessors, (386), 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 06:16:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 386 transitions. [2022-12-14 06:16:32,243 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 386 transitions. Word has length 30 [2022-12-14 06:16:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:32,243 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 386 transitions. [2022-12-14 06:16:32,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 386 transitions. [2022-12-14 06:16:32,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 06:16:32,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:32,244 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:32,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 06:16:32,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 06:16:32,445 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 66957777, now seen corresponding path program 12 times [2022-12-14 06:16:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398129874] [2022-12-14 06:16:32,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:16:32,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398129874] [2022-12-14 06:16:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398129874] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:16:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36116157] [2022-12-14 06:16:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:16:32,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:32,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:32,682 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:32,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 06:16:32,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:16:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:32,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 06:16:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:16:33,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 06:16:33,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36116157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102707862] [2022-12-14 06:16:33,432 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:16:33,432 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:16:33,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:16:33,433 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:16:33,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:16:33,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:16:33,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26745#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:16:33,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:16:33,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:16:33,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 15] total 45 [2022-12-14 06:16:33,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648389629] [2022-12-14 06:16:33,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:16:33,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 06:16:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:33,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 06:16:33,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 06:16:33,687 INFO L87 Difference]: Start difference. First operand 291 states and 386 transitions. Second operand has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:47,532 INFO L93 Difference]: Finished difference Result 705 states and 976 transitions. [2022-12-14 06:16:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-12-14 06:16:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 06:16:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:47,533 INFO L225 Difference]: With dead ends: 705 [2022-12-14 06:16:47,533 INFO L226 Difference]: Without dead ends: 653 [2022-12-14 06:16:47,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7315 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=2554, Invalid=20398, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 06:16:47,534 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 203 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 4239 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 4647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 4239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:47,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 485 Invalid, 4647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 4239 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 06:16:47,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-12-14 06:16:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 296. [2022-12-14 06:16:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.4) internal successors, (413), 295 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 413 transitions. [2022-12-14 06:16:47,730 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 413 transitions. Word has length 32 [2022-12-14 06:16:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:47,730 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 413 transitions. [2022-12-14 06:16:47,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 413 transitions. [2022-12-14 06:16:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:16:47,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:47,731 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:47,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 06:16:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:47,932 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1359519523, now seen corresponding path program 13 times [2022-12-14 06:16:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600311519] [2022-12-14 06:16:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 06:16:48,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600311519] [2022-12-14 06:16:48,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600311519] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:16:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31035446] [2022-12-14 06:16:48,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:16:48,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:48,180 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:48,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 06:16:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:48,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:16:48,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:16:48,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:16:48,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31035446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:48,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1622642118] [2022-12-14 06:16:48,435 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:16:48,435 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:16:48,435 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:16:48,435 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:16:48,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:16:48,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:16:48,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29124#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:16:48,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:16:48,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:16:48,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 27 [2022-12-14 06:16:48,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263004470] [2022-12-14 06:16:48,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:16:48,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 06:16:48,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:48,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 06:16:48,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:16:48,668 INFO L87 Difference]: Start difference. First operand 296 states and 413 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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 06:16:56,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:56,984 INFO L93 Difference]: Finished difference Result 476 states and 634 transitions. [2022-12-14 06:16:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 06:16:56,985 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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 33 [2022-12-14 06:16:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:56,986 INFO L225 Difference]: With dead ends: 476 [2022-12-14 06:16:56,986 INFO L226 Difference]: Without dead ends: 411 [2022-12-14 06:16:56,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=785, Invalid=7225, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 06:16:56,987 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 151 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:56,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 255 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 06:16:56,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-12-14 06:16:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 299. [2022-12-14 06:16:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.3859060402684564) internal successors, (413), 298 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:16:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 413 transitions. [2022-12-14 06:16:57,190 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 413 transitions. Word has length 33 [2022-12-14 06:16:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:57,191 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 413 transitions. [2022-12-14 06:16:57,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 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 06:16:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 413 transitions. [2022-12-14 06:16:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:16:57,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:57,191 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:57,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 06:16:57,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 06:16:57,392 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:16:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:57,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1989720141, now seen corresponding path program 14 times [2022-12-14 06:16:57,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:16:57,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154957025] [2022-12-14 06:16:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:16:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:16:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:16:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:16:57,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:16:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154957025] [2022-12-14 06:16:57,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154957025] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:16:57,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270085552] [2022-12-14 06:16:57,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:16:57,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:57,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:57,694 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:57,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 06:16:57,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:16:57,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-14 06:16:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:16:57,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:16:58,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270085552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:58,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549848374] [2022-12-14 06:16:58,148 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:16:58,148 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:16:58,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:16:58,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:16:58,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:16:58,209 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:16:58,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30991#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:16:58,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:16:58,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:16:58,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 11] total 30 [2022-12-14 06:16:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46272646] [2022-12-14 06:16:58,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:16:58,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:16:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:16:58,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:16:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 06:16:58,334 INFO L87 Difference]: Start difference. First operand 299 states and 413 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 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 06:17:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:17:03,949 INFO L93 Difference]: Finished difference Result 774 states and 1131 transitions. [2022-12-14 06:17:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-14 06:17:03,949 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 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 33 [2022-12-14 06:17:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:17:03,951 INFO L225 Difference]: With dead ends: 774 [2022-12-14 06:17:03,951 INFO L226 Difference]: Without dead ends: 709 [2022-12-14 06:17:03,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3245 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2333, Invalid=11709, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 06:17:03,952 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 139 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:17:03,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 129 Invalid, 2671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 06:17:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-12-14 06:17:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 337. [2022-12-14 06:17:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.4166666666666667) internal successors, (476), 336 states have internal predecessors, (476), 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 06:17:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 476 transitions. [2022-12-14 06:17:04,203 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 476 transitions. Word has length 33 [2022-12-14 06:17:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:17:04,203 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 476 transitions. [2022-12-14 06:17:04,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 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 06:17:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 476 transitions. [2022-12-14 06:17:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:17:04,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:17:04,203 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:17:04,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 06:17:04,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:04,404 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:17:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:17:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash -496959264, now seen corresponding path program 9 times [2022-12-14 06:17:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:17:04,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138063750] [2022-12-14 06:17:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:17:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:17:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:17:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:17:04,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:17:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138063750] [2022-12-14 06:17:04,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138063750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:17:04,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788362851] [2022-12-14 06:17:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:17:04,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:17:04,635 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:17:04,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 06:17:04,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:17:04,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:17:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 06:17:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:17:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:17:04,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:17:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 06:17:05,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788362851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:05,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [56194550] [2022-12-14 06:17:05,015 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:17:05,015 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:17:05,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:17:05,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:17:05,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:17:05,065 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:17:05,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33596#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:17:05,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:17:05,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:17:05,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 33 [2022-12-14 06:17:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252596169] [2022-12-14 06:17:05,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:17:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 06:17:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:17:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 06:17:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:17:05,243 INFO L87 Difference]: Start difference. First operand 337 states and 476 transitions. Second operand has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 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 06:17:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:17:08,210 INFO L93 Difference]: Finished difference Result 865 states and 1170 transitions. [2022-12-14 06:17:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 06:17:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 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 33 [2022-12-14 06:17:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:17:08,212 INFO L225 Difference]: With dead ends: 865 [2022-12-14 06:17:08,212 INFO L226 Difference]: Without dead ends: 811 [2022-12-14 06:17:08,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 06:17:08,213 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 308 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:17:08,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 577 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:17:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-12-14 06:17:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 423. [2022-12-14 06:17:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.3436018957345972) internal successors, (567), 422 states have internal predecessors, (567), 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 06:17:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 567 transitions. [2022-12-14 06:17:08,511 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 567 transitions. Word has length 33 [2022-12-14 06:17:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:17:08,511 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 567 transitions. [2022-12-14 06:17:08,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 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 06:17:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 567 transitions. [2022-12-14 06:17:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 06:17:08,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:17:08,512 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:17:08,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 06:17:08,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:08,713 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:17:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:17:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash -385177911, now seen corresponding path program 15 times [2022-12-14 06:17:08,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:17:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788103788] [2022-12-14 06:17:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:17:08,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:17:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:17:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:17:08,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:17:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788103788] [2022-12-14 06:17:08,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788103788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:17:08,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262778923] [2022-12-14 06:17:08,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:17:08,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:08,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:17:08,964 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:17:08,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 06:17:09,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:17:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:17:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 06:17:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:17:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:17:09,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:17:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 06:17:09,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262778923] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:09,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091281909] [2022-12-14 06:17:09,864 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:17:09,864 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:17:09,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:17:09,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:17:09,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:17:09,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:17:10,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36399#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:17:10,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:17:10,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:17:10,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 22] total 50 [2022-12-14 06:17:10,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92999478] [2022-12-14 06:17:10,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:17:10,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 06:17:10,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:17:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 06:17:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2640, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 06:17:10,110 INFO L87 Difference]: Start difference. First operand 423 states and 567 transitions. Second operand has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:17:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:17:54,926 INFO L93 Difference]: Finished difference Result 820 states and 1039 transitions. [2022-12-14 06:17:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-12-14 06:17:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 06:17:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:17:54,928 INFO L225 Difference]: With dead ends: 820 [2022-12-14 06:17:54,928 INFO L226 Difference]: Without dead ends: 686 [2022-12-14 06:17:54,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4498 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1190, Invalid=16366, Unknown=0, NotChecked=0, Total=17556 [2022-12-14 06:17:54,929 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 278 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:17:54,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 468 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 06:17:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-12-14 06:17:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 456. [2022-12-14 06:17:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.3208791208791208) internal successors, (601), 455 states have internal predecessors, (601), 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 06:17:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 601 transitions. [2022-12-14 06:17:55,290 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 601 transitions. Word has length 35 [2022-12-14 06:17:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:17:55,290 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 601 transitions. [2022-12-14 06:17:55,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:17:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 601 transitions. [2022-12-14 06:17:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 06:17:55,291 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:17:55,291 INFO L195 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:17:55,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 06:17:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-14 06:17:55,492 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:17:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:17:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash -792972508, now seen corresponding path program 10 times [2022-12-14 06:17:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:17:55,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185403997] [2022-12-14 06:17:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:17:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:17:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:17:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:17:55,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:17:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185403997] [2022-12-14 06:17:55,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185403997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:17:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377293310] [2022-12-14 06:17:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:17:55,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:17:55,762 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:17:55,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 06:17:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:17:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 06:17:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:17:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:17:56,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:17:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 06:17:56,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377293310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:56,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1624696452] [2022-12-14 06:17:56,544 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:17:56,544 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:17:56,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:17:56,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:17:56,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:17:56,607 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:17:56,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39299#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:17:56,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:17:56,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:17:56,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 16] total 49 [2022-12-14 06:17:56,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814546474] [2022-12-14 06:17:56,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:17:56,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 06:17:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:17:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 06:17:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:17:56,792 INFO L87 Difference]: Start difference. First operand 456 states and 601 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:15,334 INFO L93 Difference]: Finished difference Result 1066 states and 1428 transitions. [2022-12-14 06:18:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-12-14 06:18:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 06:18:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:15,336 INFO L225 Difference]: With dead ends: 1066 [2022-12-14 06:18:15,336 INFO L226 Difference]: Without dead ends: 924 [2022-12-14 06:18:15,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11928 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3382, Invalid=31774, Unknown=0, NotChecked=0, Total=35156 [2022-12-14 06:18:15,338 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 234 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 5457 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 6050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 5457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:15,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 617 Invalid, 6050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 5457 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 06:18:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-12-14 06:18:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 465. [2022-12-14 06:18:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.3599137931034482) internal successors, (631), 464 states have internal predecessors, (631), 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 06:18:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 631 transitions. [2022-12-14 06:18:15,786 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 631 transitions. Word has length 35 [2022-12-14 06:18:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:15,786 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 631 transitions. [2022-12-14 06:18:15,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:18:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 631 transitions. [2022-12-14 06:18:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 06:18:15,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:15,787 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:15,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-14 06:18:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 06:18:15,988 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:18:15,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:15,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1947573733, now seen corresponding path program 16 times [2022-12-14 06:18:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:18:15,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851294575] [2022-12-14 06:18:15,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:18:15,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:18:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 06:18:16,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:18:16,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851294575] [2022-12-14 06:18:16,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851294575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:18:16,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824325085] [2022-12-14 06:18:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:18:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:16,339 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 06:18:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:18:16,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 06:18:16,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:18:16,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 74 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 06:18:16,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824325085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:16,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2099362021] [2022-12-14 06:18:16,644 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:18:16,644 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:18:16,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:18:16,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:18:16,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:18:16,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:18:16,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42817#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:18:16,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:18:16,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:18:16,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-12-14 06:18:16,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778147922] [2022-12-14 06:18:16,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 06:18:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:18:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 06:18:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:18:16,895 INFO L87 Difference]: Start difference. First operand 465 states and 631 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 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 06:20:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:20:26,090 INFO L93 Difference]: Finished difference Result 774 states and 1119 transitions. [2022-12-14 06:20:26,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 06:20:26,090 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 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 36 [2022-12-14 06:20:26,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:20:26,091 INFO L225 Difference]: With dead ends: 774 [2022-12-14 06:20:26,091 INFO L226 Difference]: Without dead ends: 700 [2022-12-14 06:20:26,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17711 ImplicationChecksByTransitivity, 120.5s TimeCoverageRelationStatistics Valid=3438, Invalid=46962, Unknown=0, NotChecked=0, Total=50400 [2022-12-14 06:20:26,093 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 411 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4746 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 5115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 4746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:20:26,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 188 Invalid, 5115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 4746 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-12-14 06:20:26,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-12-14 06:20:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 511. [2022-12-14 06:20:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3490196078431373) internal successors, (688), 510 states have internal predecessors, (688), 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 06:20:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 688 transitions. [2022-12-14 06:20:26,620 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 688 transitions. Word has length 36 [2022-12-14 06:20:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:20:26,621 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 688 transitions. [2022-12-14 06:20:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 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 06:20:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 688 transitions. [2022-12-14 06:20:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 06:20:26,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:20:26,621 INFO L195 NwaCegarLoop]: trace histogram [15, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:20:26,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 06:20:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:26,823 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:20:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:20:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1304915424, now seen corresponding path program 11 times [2022-12-14 06:20:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:20:26,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39240021] [2022-12-14 06:20:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:20:26,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:20:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:20:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:20:27,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:20:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39240021] [2022-12-14 06:20:27,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39240021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24370995] [2022-12-14 06:20:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:20:27,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:20:27,114 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:20:27,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 06:20:27,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:20:27,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:20:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-14 06:20:27,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-12-14 06:20:27,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24370995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:20:27,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830743761] [2022-12-14 06:20:27,368 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:20:27,368 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:20:27,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:20:27,369 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:20:27,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:20:27,428 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:20:27,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45992#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:20:27,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:20:27,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:20:27,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8, 8] total 29 [2022-12-14 06:20:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720368637] [2022-12-14 06:20:27,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:20:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 06:20:27,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:20:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 06:20:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 06:20:27,551 INFO L87 Difference]: Start difference. First operand 511 states and 688 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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 06:20:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:20:43,594 INFO L93 Difference]: Finished difference Result 1365 states and 1821 transitions. [2022-12-14 06:20:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-12-14 06:20:43,594 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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 37 [2022-12-14 06:20:43,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:20:43,600 INFO L225 Difference]: With dead ends: 1365 [2022-12-14 06:20:43,600 INFO L226 Difference]: Without dead ends: 1192 [2022-12-14 06:20:43,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13283 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2240, Invalid=35590, Unknown=0, NotChecked=0, Total=37830 [2022-12-14 06:20:43,601 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 177 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:20:43,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 553 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 06:20:43,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2022-12-14 06:20:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 591. [2022-12-14 06:20:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.3152542372881355) internal successors, (776), 590 states have internal predecessors, (776), 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 06:20:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 776 transitions. [2022-12-14 06:20:44,190 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 776 transitions. Word has length 37 [2022-12-14 06:20:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:20:44,190 INFO L495 AbstractCegarLoop]: Abstraction has 591 states and 776 transitions. [2022-12-14 06:20:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 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 06:20:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 776 transitions. [2022-12-14 06:20:44,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:20:44,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:20:44,191 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:20:44,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 06:20:44,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:44,392 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:20:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:20:44,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1569633727, now seen corresponding path program 17 times [2022-12-14 06:20:44,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:20:44,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878130597] [2022-12-14 06:20:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:20:44,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:20:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:20:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-14 06:20:44,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:20:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878130597] [2022-12-14 06:20:44,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878130597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976853981] [2022-12-14 06:20:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:20:44,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:20:44,662 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:20:44,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 06:20:44,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:20:44,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:44,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 06:20:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 06:20:44,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 06:20:45,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976853981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:20:45,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254628547] [2022-12-14 06:20:45,255 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:20:45,255 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:20:45,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:20:45,255 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:20:45,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:20:45,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:20:45,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50431#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:20:45,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:20:45,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:20:45,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 37 [2022-12-14 06:20:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394385274] [2022-12-14 06:20:45,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:20:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 06:20:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:20:45,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 06:20:45,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:20:45,490 INFO L87 Difference]: Start difference. First operand 591 states and 776 transitions. Second operand has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:21:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:21:26,953 INFO L93 Difference]: Finished difference Result 1186 states and 1546 transitions. [2022-12-14 06:21:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-14 06:21:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 06:21:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:21:26,957 INFO L225 Difference]: With dead ends: 1186 [2022-12-14 06:21:26,957 INFO L226 Difference]: Without dead ends: 1086 [2022-12-14 06:21:26,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19119 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=4474, Invalid=48196, Unknown=0, NotChecked=0, Total=52670 [2022-12-14 06:21:26,959 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 382 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:21:26,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 356 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 06:21:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-12-14 06:21:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 642. [2022-12-14 06:21:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.3354134165366616) internal successors, (856), 641 states have internal predecessors, (856), 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 06:21:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 856 transitions. [2022-12-14 06:21:27,586 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 856 transitions. Word has length 38 [2022-12-14 06:21:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:21:27,586 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 856 transitions. [2022-12-14 06:21:27,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:21:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 856 transitions. [2022-12-14 06:21:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:21:27,586 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:21:27,586 INFO L195 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:21:27,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 06:21:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 06:21:27,788 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:21:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:21:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash 567907185, now seen corresponding path program 12 times [2022-12-14 06:21:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:21:27,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787701953] [2022-12-14 06:21:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:21:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:21:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 06:21:28,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:21:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787701953] [2022-12-14 06:21:28,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787701953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:21:28,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225679580] [2022-12-14 06:21:28,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:21:28,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:28,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:21:28,066 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:21:28,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 06:21:28,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:21:28,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:21:28,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-14 06:21:28,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:21:28,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 06:21:28,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225679580] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:28,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163770426] [2022-12-14 06:21:28,928 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:21:28,928 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:21:28,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:21:28,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:21:28,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:21:28,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:21:29,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54711#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:21:29,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:21:29,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:21:29,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 31, 16] total 51 [2022-12-14 06:21:29,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307783555] [2022-12-14 06:21:29,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:21:29,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:21:29,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:21:29,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:21:29,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2659, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:21:29,187 INFO L87 Difference]: Start difference. First operand 642 states and 856 transitions. Second operand has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 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 06:21:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:21:48,730 INFO L93 Difference]: Finished difference Result 1460 states and 1945 transitions. [2022-12-14 06:21:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-12-14 06:21:48,731 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 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 38 [2022-12-14 06:21:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:21:48,733 INFO L225 Difference]: With dead ends: 1460 [2022-12-14 06:21:48,733 INFO L226 Difference]: Without dead ends: 1243 [2022-12-14 06:21:48,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12569 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3290, Invalid=34152, Unknown=0, NotChecked=0, Total=37442 [2022-12-14 06:21:48,735 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 6027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:21:48,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 665 Invalid, 6027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 06:21:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-12-14 06:21:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 659. [2022-12-14 06:21:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 1.3693009118541033) internal successors, (901), 658 states have internal predecessors, (901), 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 06:21:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 901 transitions. [2022-12-14 06:21:49,497 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 901 transitions. Word has length 38 [2022-12-14 06:21:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:21:49,497 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 901 transitions. [2022-12-14 06:21:49,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 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 06:21:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 901 transitions. [2022-12-14 06:21:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:21:49,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:21:49,498 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:21:49,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 06:21:49,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:49,699 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:21:49,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:21:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1154357719, now seen corresponding path program 13 times [2022-12-14 06:21:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:21:49,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758113378] [2022-12-14 06:21:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:21:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:21:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:21:50,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:21:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758113378] [2022-12-14 06:21:50,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758113378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:21:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815274798] [2022-12-14 06:21:50,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:21:50,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:21:50,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:21:50,058 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:21:50,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 06:21:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:21:50,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 06:21:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:21:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:21:50,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:21:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 06:21:50,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815274798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:21:50,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1413227712] [2022-12-14 06:21:50,584 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:21:50,584 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:21:50,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:21:50,585 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:21:50,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:21:50,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:21:50,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59444#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:21:50,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:21:50,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:21:50,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 12] total 40 [2022-12-14 06:21:50,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375729404] [2022-12-14 06:21:50,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:21:50,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 06:21:50,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:21:50,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 06:21:50,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1795, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 06:21:50,876 INFO L87 Difference]: Start difference. First operand 659 states and 901 transitions. Second operand has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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 06:22:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:06,866 INFO L93 Difference]: Finished difference Result 1417 states and 1873 transitions. [2022-12-14 06:22:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-12-14 06:22:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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 40 [2022-12-14 06:22:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:06,868 INFO L225 Difference]: With dead ends: 1417 [2022-12-14 06:22:06,868 INFO L226 Difference]: Without dead ends: 1125 [2022-12-14 06:22:06,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7164 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1243, Invalid=22937, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 06:22:06,869 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 253 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 4367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:06,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 918 Invalid, 4367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 06:22:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-12-14 06:22:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 728. [2022-12-14 06:22:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 1.3356258596973865) internal successors, (971), 727 states have internal predecessors, (971), 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 06:22:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 971 transitions. [2022-12-14 06:22:07,614 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 971 transitions. Word has length 40 [2022-12-14 06:22:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:07,614 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 971 transitions. [2022-12-14 06:22:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 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 06:22:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 971 transitions. [2022-12-14 06:22:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 06:22:07,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:07,615 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:07,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 06:22:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 06:22:07,816 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1274601821, now seen corresponding path program 18 times [2022-12-14 06:22:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:07,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051317792] [2022-12-14 06:22:07,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:07,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:22:08,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051317792] [2022-12-14 06:22:08,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051317792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:08,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244701088] [2022-12-14 06:22:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:22:08,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:08,140 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:08,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 06:22:08,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:22:08,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 06:22:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 06:22:08,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:22:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 06:22:08,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244701088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:22:08,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015389071] [2022-12-14 06:22:08,528 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:22:08,528 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:22:08,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:22:08,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:22:08,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:22:08,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:22:08,813 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64157#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:22:08,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:22:08,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:22:08,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 33 [2022-12-14 06:22:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178679777] [2022-12-14 06:22:08,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:22:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 06:22:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 06:22:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:22:08,815 INFO L87 Difference]: Start difference. First operand 728 states and 971 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 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 06:22:40,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:40,705 INFO L93 Difference]: Finished difference Result 1007 states and 1310 transitions. [2022-12-14 06:22:40,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 06:22:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 06:22:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:40,708 INFO L225 Difference]: With dead ends: 1007 [2022-12-14 06:22:40,708 INFO L226 Difference]: Without dead ends: 941 [2022-12-14 06:22:40,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4901 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=1435, Invalid=16387, Unknown=0, NotChecked=0, Total=17822 [2022-12-14 06:22:40,709 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 230 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 2477 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 2477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:40,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 440 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 2477 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 06:22:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-12-14 06:22:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 780. [2022-12-14 06:22:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 1.3170731707317074) internal successors, (1026), 779 states have internal predecessors, (1026), 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 06:22:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1026 transitions. [2022-12-14 06:22:41,516 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1026 transitions. Word has length 41 [2022-12-14 06:22:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 1026 transitions. [2022-12-14 06:22:41,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 33 states have internal predecessors, (54), 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 06:22:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1026 transitions. [2022-12-14 06:22:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 06:22:41,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:41,517 INFO L195 NwaCegarLoop]: trace histogram [18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:41,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 06:22:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:41,718 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash 30031236, now seen corresponding path program 14 times [2022-12-14 06:22:41,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:41,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030659344] [2022-12-14 06:22:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:22:42,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030659344] [2022-12-14 06:22:42,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030659344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169089394] [2022-12-14 06:22:42,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:22:42,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:42,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:42,083 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:42,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 06:22:42,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:22:42,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 06:22:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-12-14 06:22:42,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:22:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-12-14 06:22:43,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169089394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:22:43,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804253] [2022-12-14 06:22:43,017 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:22:43,017 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:22:43,017 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:22:43,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:22:43,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:22:43,078 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:22:43,332 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '68189#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:22:43,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:22:43,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:22:43,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 17] total 51 [2022-12-14 06:22:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10630689] [2022-12-14 06:22:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:22:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 06:22:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 06:22:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2841, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 06:22:43,334 INFO L87 Difference]: Start difference. First operand 780 states and 1026 transitions. Second operand has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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 06:23:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:17,279 INFO L93 Difference]: Finished difference Result 1665 states and 2185 transitions. [2022-12-14 06:23:17,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-12-14 06:23:17,279 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 06:23:17,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:17,281 INFO L225 Difference]: With dead ends: 1665 [2022-12-14 06:23:17,281 INFO L226 Difference]: Without dead ends: 1350 [2022-12-14 06:23:17,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23079 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=5202, Invalid=65820, Unknown=0, NotChecked=0, Total=71022 [2022-12-14 06:23:17,284 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 367 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 8054 mSolverCounterSat, 1291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 9345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1291 IncrementalHoareTripleChecker+Valid, 8054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:17,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 1048 Invalid, 9345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1291 Valid, 8054 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 06:23:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-12-14 06:23:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 705. [2022-12-14 06:23:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.3607954545454546) internal successors, (958), 704 states have internal predecessors, (958), 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 06:23:18,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 958 transitions. [2022-12-14 06:23:18,121 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 958 transitions. Word has length 41 [2022-12-14 06:23:18,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:18,121 INFO L495 AbstractCegarLoop]: Abstraction has 705 states and 958 transitions. [2022-12-14 06:23:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 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 06:23:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 958 transitions. [2022-12-14 06:23:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 06:23:18,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:18,122 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:18,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 06:23:18,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-14 06:23:18,323 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -949246191, now seen corresponding path program 19 times [2022-12-14 06:23:18,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886263305] [2022-12-14 06:23:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:18,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 06:23:18,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886263305] [2022-12-14 06:23:18,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886263305] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921247885] [2022-12-14 06:23:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:23:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:18,714 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:18,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 06:23:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:23:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:23:19,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:23:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:23:19,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921247885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:23:19,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1098897768] [2022-12-14 06:23:19,123 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:23:19,123 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:23:19,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:23:19,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:23:19,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:23:19,204 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:23:19,400 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73571#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:23:19,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:23:19,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:23:19,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13, 13] total 36 [2022-12-14 06:23:19,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654302854] [2022-12-14 06:23:19,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:23:19,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 06:23:19,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 06:23:19,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 06:23:19,401 INFO L87 Difference]: Start difference. First operand 705 states and 958 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 06:26:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:26:17,513 INFO L93 Difference]: Finished difference Result 1107 states and 1574 transitions. [2022-12-14 06:26:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-12-14 06:26:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 42 [2022-12-14 06:26:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:26:17,515 INFO L225 Difference]: With dead ends: 1107 [2022-12-14 06:26:17,515 INFO L226 Difference]: Without dead ends: 987 [2022-12-14 06:26:17,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21690 ImplicationChecksByTransitivity, 166.7s TimeCoverageRelationStatistics Valid=4231, Invalid=56531, Unknown=0, NotChecked=0, Total=60762 [2022-12-14 06:26:17,517 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 447 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 5384 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 5817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 5384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:26:17,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 199 Invalid, 5817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 5384 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-12-14 06:26:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-12-14 06:26:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 723. [2022-12-14 06:26:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 1.350415512465374) internal successors, (975), 722 states have internal predecessors, (975), 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 06:26:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 975 transitions. [2022-12-14 06:26:18,759 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 975 transitions. Word has length 42 [2022-12-14 06:26:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:26:18,760 INFO L495 AbstractCegarLoop]: Abstraction has 723 states and 975 transitions. [2022-12-14 06:26:18,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 36 states have internal predecessors, (67), 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 06:26:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 975 transitions. [2022-12-14 06:26:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:26:18,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:26:18,760 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:26:18,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 06:26:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:18,961 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:26:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:26:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1199247333, now seen corresponding path program 20 times [2022-12-14 06:26:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:26:18,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116952808] [2022-12-14 06:26:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:26:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:26:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:26:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 06:26:19,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:26:19,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116952808] [2022-12-14 06:26:19,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116952808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:26:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301731380] [2022-12-14 06:26:19,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:26:19,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:26:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:26:19,296 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:26:19,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 06:26:19,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 06:26:19,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:26:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 06:26:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:26:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 06:26:20,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:26:20,565 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-12-14 06:26:20,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301731380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:26:20,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903075000] [2022-12-14 06:26:20,566 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:26:20,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:26:20,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:26:20,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:26:20,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:26:20,629 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:26:20,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '77931#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:26:20,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:26:20,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:26:20,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 44 [2022-12-14 06:26:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995795247] [2022-12-14 06:26:20,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:26:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 06:26:20,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:26:20,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 06:26:20,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 06:26:20,810 INFO L87 Difference]: Start difference. First operand 723 states and 975 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 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 06:28:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:28:44,660 INFO L93 Difference]: Finished difference Result 1514 states and 2035 transitions. [2022-12-14 06:28:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-12-14 06:28:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 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 44 [2022-12-14 06:28:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:28:44,663 INFO L225 Difference]: With dead ends: 1514 [2022-12-14 06:28:44,663 INFO L226 Difference]: Without dead ends: 1361 [2022-12-14 06:28:44,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38516 ImplicationChecksByTransitivity, 135.7s TimeCoverageRelationStatistics Valid=8067, Invalid=91473, Unknown=0, NotChecked=0, Total=99540 [2022-12-14 06:28:44,667 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 569 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 4593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 4076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:28:44,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 558 Invalid, 4593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 06:28:44,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-12-14 06:28:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 881. [2022-12-14 06:28:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 1.3909090909090909) internal successors, (1224), 880 states have internal predecessors, (1224), 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 06:28:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1224 transitions. [2022-12-14 06:28:45,748 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1224 transitions. Word has length 44 [2022-12-14 06:28:45,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:28:45,748 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1224 transitions. [2022-12-14 06:28:45,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 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 06:28:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1224 transitions. [2022-12-14 06:28:45,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:28:45,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:28:45,749 INFO L195 NwaCegarLoop]: trace histogram [19, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:28:45,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 06:28:45,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:45,950 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:28:45,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:28:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1362487431, now seen corresponding path program 15 times [2022-12-14 06:28:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:28:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760048981] [2022-12-14 06:28:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:28:45,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:28:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:28:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:28:46,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:28:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760048981] [2022-12-14 06:28:46,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760048981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:28:46,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536197622] [2022-12-14 06:28:46,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:28:46,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:28:46,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:28:46,403 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:28:46,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 06:28:46,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:28:46,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:28:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-14 06:28:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:28:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-14 06:28:46,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:28:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-12-14 06:28:47,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536197622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:28:47,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643307826] [2022-12-14 06:28:47,079 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:28:47,079 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:28:47,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:28:47,079 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:28:47,079 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:28:47,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:28:47,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83532#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:28:47,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:28:47,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:28:47,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 14] total 46 [2022-12-14 06:28:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550085760] [2022-12-14 06:28:47,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:28:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:28:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:28:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:28:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2322, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 06:28:47,303 INFO L87 Difference]: Start difference. First operand 881 states and 1224 transitions. Second operand has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:29:16,277 INFO L93 Difference]: Finished difference Result 2028 states and 2715 transitions. [2022-12-14 06:29:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-12-14 06:29:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 06:29:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:29:16,284 INFO L225 Difference]: With dead ends: 2028 [2022-12-14 06:29:16,284 INFO L226 Difference]: Without dead ends: 1591 [2022-12-14 06:29:16,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11077 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1733, Invalid=34177, Unknown=0, NotChecked=0, Total=35910 [2022-12-14 06:29:16,286 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 249 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 5319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:29:16,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1324 Invalid, 5319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 06:29:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1591 states. [2022-12-14 06:29:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1591 to 1019. [2022-12-14 06:29:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 1.3398821218074657) internal successors, (1364), 1018 states have internal predecessors, (1364), 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 06:29:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1364 transitions. [2022-12-14 06:29:17,413 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1364 transitions. Word has length 44 [2022-12-14 06:29:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:29:17,414 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1364 transitions. [2022-12-14 06:29:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:29:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1364 transitions. [2022-12-14 06:29:17,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 06:29:17,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:29:17,414 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:29:17,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 06:29:17,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-14 06:29:17,616 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:29:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:29:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash -724624056, now seen corresponding path program 16 times [2022-12-14 06:29:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:29:17,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062638023] [2022-12-14 06:29:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:29:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:29:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:29:18,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:29:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062638023] [2022-12-14 06:29:18,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062638023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:29:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583365316] [2022-12-14 06:29:18,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:29:18,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:29:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:29:18,122 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:29:18,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dea61939-cecd-4718-aae1-1269e26c3d5e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 06:29:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:29:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 99 conjunts are in the unsatisfiable core [2022-12-14 06:29:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:29:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:29:18,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:29:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-14 06:29:19,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583365316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:29:19,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1021483446] [2022-12-14 06:29:19,465 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 06:29:19,465 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:29:19,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:29:19,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:29:19,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:29:19,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:29:19,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90151#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~y~0#1| 4294967296) 0) 1 0)) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:29:19,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:29:19,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:29:19,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 20] total 64 [2022-12-14 06:29:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513558279] [2022-12-14 06:29:19,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:29:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 06:29:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:29:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 06:29:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=4069, Unknown=0, NotChecked=0, Total=4692 [2022-12-14 06:29:19,843 INFO L87 Difference]: Start difference. First operand 1019 states and 1364 transitions. Second operand has 64 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 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)