./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.14.cil.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_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/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_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/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_4c8c329a-b7fd-4410-86d9-9a0703b32add/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 78a96934dff25285973ef889167a345947d7e73ab8a2ec405d96bd61e690530f --- 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 13:05:28,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:05:28,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:05:28,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:05:28,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:05:28,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:05:28,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:05:28,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:05:28,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:05:28,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:05:28,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:05:28,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:05:28,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:05:28,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:05:28,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:05:28,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:05:28,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:05:28,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:05:28,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:05:28,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:05:28,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:05:28,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:05:28,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:05:28,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:05:28,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:05:28,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:05:28,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:05:28,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:05:28,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:05:28,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:05:28,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:05:28,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:05:28,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:05:28,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:05:28,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:05:28,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:05:28,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:05:28,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:05:28,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:05:28,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:05:28,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:05:28,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:05:28,206 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:05:28,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:05:28,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:05:28,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:05:28,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:05:28,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:05:28,207 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:05:28,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:05:28,207 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:05:28,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:05:28,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:05:28,208 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:05:28,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:05:28,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:05:28,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:05:28,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:05:28,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:05:28,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78a96934dff25285973ef889167a345947d7e73ab8a2ec405d96bd61e690530f [2022-12-14 13:05:28,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:05:28,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:05:28,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:05:28,395 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:05:28,396 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:05:28,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.14.cil.c [2022-12-14 13:05:30,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:05:31,138 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:05:31,138 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/sv-benchmarks/c/systemc/token_ring.14.cil.c [2022-12-14 13:05:31,146 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/data/808d528cc/cf273baeed7345199665608e6605b971/FLAG889885baa [2022-12-14 13:05:31,537 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/data/808d528cc/cf273baeed7345199665608e6605b971 [2022-12-14 13:05:31,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:05:31,540 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:05:31,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:05:31,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:05:31,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:05:31,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f96cf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31, skipping insertion in model container [2022-12-14 13:05:31,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:05:31,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:05:31,673 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_4c8c329a-b7fd-4410-86d9-9a0703b32add/sv-benchmarks/c/systemc/token_ring.14.cil.c[669,682] [2022-12-14 13:05:31,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:05:31,764 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:05:31,772 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_4c8c329a-b7fd-4410-86d9-9a0703b32add/sv-benchmarks/c/systemc/token_ring.14.cil.c[669,682] [2022-12-14 13:05:31,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:05:31,834 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:05:31,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31 WrapperNode [2022-12-14 13:05:31,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:05:31,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:05:31,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:05:31,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:05:31,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,879 INFO L138 Inliner]: procedures = 52, calls = 68, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 856 [2022-12-14 13:05:31,879 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:05:31,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:05:31,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:05:31,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:05:31,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,909 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:05:31,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:05:31,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:05:31,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:05:31,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (1/1) ... [2022-12-14 13:05:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:05:31,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:31,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:05:31,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:05:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:05:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:05:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:05:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:05:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:05:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:05:31,976 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:05:31,976 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 13:05:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 13:05:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:05:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:05:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:05:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:05:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:05:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:05:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:05:31,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:05:31,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:05:32,089 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:05:32,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:05:32,685 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:05:32,993 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:05:32,993 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-12-14 13:05:32,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:05:32 BoogieIcfgContainer [2022-12-14 13:05:32,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:05:32,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:05:32,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:05:33,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:05:33,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:05:31" (1/3) ... [2022-12-14 13:05:33,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156057df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:05:33, skipping insertion in model container [2022-12-14 13:05:33,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:05:31" (2/3) ... [2022-12-14 13:05:33,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156057df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:05:33, skipping insertion in model container [2022-12-14 13:05:33,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:05:32" (3/3) ... [2022-12-14 13:05:33,002 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.14.cil.c [2022-12-14 13:05:33,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:05:33,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:05:33,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:05:33,059 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;@700b8534, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:05:33,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:05:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 157 states have (on average 1.5668789808917198) internal successors, (246), 161 states have internal predecessors, (246), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-12-14 13:05:33,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 13:05:33,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:33,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:33,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:33,076 INFO L85 PathProgramCache]: Analyzing trace with hash 989019073, now seen corresponding path program 1 times [2022-12-14 13:05:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:33,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559871337] [2022-12-14 13:05:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:33,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:33,416 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 13:05:33,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559871337] [2022-12-14 13:05:33,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559871337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:33,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:33,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:05:33,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615703463] [2022-12-14 13:05:33,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:33,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:05:33,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:05:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:33,445 INFO L87 Difference]: Start difference. First operand has 194 states, 157 states have (on average 1.5668789808917198) internal successors, (246), 161 states have internal predecessors, (246), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:05:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:33,818 INFO L93 Difference]: Finished difference Result 559 states and 888 transitions. [2022-12-14 13:05:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:05:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 67 [2022-12-14 13:05:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:33,831 INFO L225 Difference]: With dead ends: 559 [2022-12-14 13:05:33,831 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 13:05:33,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:33,839 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 520 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:33,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 824 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 13:05:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2022-12-14 13:05:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 302 states have (on average 1.5298013245033113) internal successors, (462), 305 states have internal predecessors, (462), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 13:05:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 560 transitions. [2022-12-14 13:05:33,906 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 560 transitions. Word has length 67 [2022-12-14 13:05:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:33,907 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 560 transitions. [2022-12-14 13:05:33,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 13:05:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 560 transitions. [2022-12-14 13:05:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:33,913 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:33,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:33,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:05:33,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1012255586, now seen corresponding path program 1 times [2022-12-14 13:05:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:33,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269653948] [2022-12-14 13:05:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:33,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:05:34,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269653948] [2022-12-14 13:05:34,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269653948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628032223] [2022-12-14 13:05:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:34,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:34,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:05:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:34,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:05:34,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628032223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:34,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:34,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:05:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635768063] [2022-12-14 13:05:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:34,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:34,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:34,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:34,396 INFO L87 Difference]: Start difference. First operand 365 states and 560 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:34,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:34,541 INFO L93 Difference]: Finished difference Result 1078 states and 1683 transitions. [2022-12-14 13:05:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:34,549 INFO L225 Difference]: With dead ends: 1078 [2022-12-14 13:05:34,549 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 13:05:34,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:34,552 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 249 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:34,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 538 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 13:05:34,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 712. [2022-12-14 13:05:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 595 states have (on average 1.5277310924369747) internal successors, (909), 599 states have internal predecessors, (909), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 13:05:34,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1091 transitions. [2022-12-14 13:05:34,602 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1091 transitions. Word has length 136 [2022-12-14 13:05:34,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:34,603 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 1091 transitions. [2022-12-14 13:05:34,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:34,603 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1091 transitions. [2022-12-14 13:05:34,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:34,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:34,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:34,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:34,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:34,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:34,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1041141826, now seen corresponding path program 1 times [2022-12-14 13:05:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497787745] [2022-12-14 13:05:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:34,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:05:35,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497787745] [2022-12-14 13:05:35,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497787745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33905438] [2022-12-14 13:05:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:35,079 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:35,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:05:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:35,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 13:05:35,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:35,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33905438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:35,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:35,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:05:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390909676] [2022-12-14 13:05:35,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:35,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:35,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:35,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:35,286 INFO L87 Difference]: Start difference. First operand 712 states and 1091 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:35,448 INFO L93 Difference]: Finished difference Result 2113 states and 3294 transitions. [2022-12-14 13:05:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:35,453 INFO L225 Difference]: With dead ends: 2113 [2022-12-14 13:05:35,453 INFO L226 Difference]: Without dead ends: 1406 [2022-12-14 13:05:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:35,456 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 267 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:35,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 526 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-12-14 13:05:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1398. [2022-12-14 13:05:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1175 states have (on average 1.524255319148936) internal successors, (1791), 1181 states have internal predecessors, (1791), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 13:05:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2137 transitions. [2022-12-14 13:05:35,514 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2137 transitions. Word has length 136 [2022-12-14 13:05:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:35,514 INFO L495 AbstractCegarLoop]: Abstraction has 1398 states and 2137 transitions. [2022-12-14 13:05:35,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2137 transitions. [2022-12-14 13:05:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:35,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:35,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:35,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:05:35,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:35,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:35,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1447830238, now seen corresponding path program 1 times [2022-12-14 13:05:35,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:35,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512711364] [2022-12-14 13:05:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:05:35,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512711364] [2022-12-14 13:05:35,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512711364] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724872063] [2022-12-14 13:05:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:35,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:35,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:35,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:05:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 13:05:36,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:36,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724872063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:36,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:36,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:05:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699414048] [2022-12-14 13:05:36,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:36,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:36,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:36,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:36,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:36,034 INFO L87 Difference]: Start difference. First operand 1398 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:36,243 INFO L93 Difference]: Finished difference Result 4159 states and 6466 transitions. [2022-12-14 13:05:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:36,257 INFO L225 Difference]: With dead ends: 4159 [2022-12-14 13:05:36,258 INFO L226 Difference]: Without dead ends: 2766 [2022-12-14 13:05:36,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:36,264 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 270 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:36,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 536 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-12-14 13:05:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2754. [2022-12-14 13:05:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2754 states, 2323 states have (on average 1.5200172191132157) internal successors, (3531), 2333 states have internal predecessors, (3531), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-12-14 13:05:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2754 states to 2754 states and 4197 transitions. [2022-12-14 13:05:36,356 INFO L78 Accepts]: Start accepts. Automaton has 2754 states and 4197 transitions. Word has length 136 [2022-12-14 13:05:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:36,356 INFO L495 AbstractCegarLoop]: Abstraction has 2754 states and 4197 transitions. [2022-12-14 13:05:36,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2754 states and 4197 transitions. [2022-12-14 13:05:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:36,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:36,361 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:36,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 13:05:36,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:36,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:36,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2099190718, now seen corresponding path program 1 times [2022-12-14 13:05:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:36,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043384445] [2022-12-14 13:05:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:05:36,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:36,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043384445] [2022-12-14 13:05:36,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043384445] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:36,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120093360] [2022-12-14 13:05:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:36,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:36,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:36,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:05:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:36,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 13:05:36,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:36,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120093360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:36,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:36,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:05:36,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569516966] [2022-12-14 13:05:36,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:36,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:36,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:36,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:36,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:36,834 INFO L87 Difference]: Start difference. First operand 2754 states and 4197 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:37,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:37,097 INFO L93 Difference]: Finished difference Result 8203 states and 12710 transitions. [2022-12-14 13:05:37,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:37,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:37,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:37,114 INFO L225 Difference]: With dead ends: 8203 [2022-12-14 13:05:37,115 INFO L226 Difference]: Without dead ends: 5454 [2022-12-14 13:05:37,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:37,122 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 261 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:37,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5454 states. [2022-12-14 13:05:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5454 to 5434. [2022-12-14 13:05:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5434 states, 4595 states have (on average 1.5153427638737758) internal successors, (6963), 4613 states have internal predecessors, (6963), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-12-14 13:05:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5434 states to 5434 states and 8253 transitions. [2022-12-14 13:05:37,325 INFO L78 Accepts]: Start accepts. Automaton has 5434 states and 8253 transitions. Word has length 136 [2022-12-14 13:05:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:37,325 INFO L495 AbstractCegarLoop]: Abstraction has 5434 states and 8253 transitions. [2022-12-14 13:05:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5434 states and 8253 transitions. [2022-12-14 13:05:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:37,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:37,336 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:37,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:05:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:37,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1271310046, now seen corresponding path program 1 times [2022-12-14 13:05:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:37,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310551545] [2022-12-14 13:05:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:37,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:05:37,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310551545] [2022-12-14 13:05:37,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310551545] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:37,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024833452] [2022-12-14 13:05:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:37,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:37,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:05:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:37,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:05:37,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:37,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024833452] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:37,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:37,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:05:37,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213814338] [2022-12-14 13:05:37,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:37,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:37,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:37,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:37,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:37,846 INFO L87 Difference]: Start difference. First operand 5434 states and 8253 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:38,211 INFO L93 Difference]: Finished difference Result 16195 states and 24998 transitions. [2022-12-14 13:05:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:38,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:38,261 INFO L225 Difference]: With dead ends: 16195 [2022-12-14 13:05:38,261 INFO L226 Difference]: Without dead ends: 10766 [2022-12-14 13:05:38,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:38,277 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 240 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:38,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10766 states. [2022-12-14 13:05:38,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10766 to 10730. [2022-12-14 13:05:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10730 states, 9091 states have (on average 1.5103948960510394) internal successors, (13731), 9125 states have internal predecessors, (13731), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-12-14 13:05:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10730 states to 10730 states and 16237 transitions. [2022-12-14 13:05:38,651 INFO L78 Accepts]: Start accepts. Automaton has 10730 states and 16237 transitions. Word has length 136 [2022-12-14 13:05:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:38,651 INFO L495 AbstractCegarLoop]: Abstraction has 10730 states and 16237 transitions. [2022-12-14 13:05:38,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:38,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10730 states and 16237 transitions. [2022-12-14 13:05:38,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:38,668 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:38,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:38,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:05:38,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:38,870 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1409652802, now seen corresponding path program 1 times [2022-12-14 13:05:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:38,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679756454] [2022-12-14 13:05:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:05:39,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:39,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679756454] [2022-12-14 13:05:39,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679756454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:39,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17762731] [2022-12-14 13:05:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:39,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:39,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:39,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:39,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:05:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:39,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:05:39,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:39,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17762731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:39,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:39,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 13:05:39,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675764179] [2022-12-14 13:05:39,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:39,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:39,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:39,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:39,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:39,216 INFO L87 Difference]: Start difference. First operand 10730 states and 16237 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:39,811 INFO L93 Difference]: Finished difference Result 31987 states and 49174 transitions. [2022-12-14 13:05:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:39,878 INFO L225 Difference]: With dead ends: 31987 [2022-12-14 13:05:39,878 INFO L226 Difference]: Without dead ends: 21262 [2022-12-14 13:05:39,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:05:39,902 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 243 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:39,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21262 states. [2022-12-14 13:05:40,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21262 to 21194. [2022-12-14 13:05:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21194 states, 17987 states have (on average 1.5052537944070719) internal successors, (27075), 18053 states have internal predecessors, (27075), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-12-14 13:05:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21194 states to 21194 states and 31949 transitions. [2022-12-14 13:05:40,683 INFO L78 Accepts]: Start accepts. Automaton has 21194 states and 31949 transitions. Word has length 136 [2022-12-14 13:05:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:40,684 INFO L495 AbstractCegarLoop]: Abstraction has 21194 states and 31949 transitions. [2022-12-14 13:05:40,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:40,684 INFO L276 IsEmpty]: Start isEmpty. Operand 21194 states and 31949 transitions. [2022-12-14 13:05:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:40,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:40,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:40,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:05:40,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:40,906 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:40,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:40,906 INFO L85 PathProgramCache]: Analyzing trace with hash 762021154, now seen corresponding path program 1 times [2022-12-14 13:05:40,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:40,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65792014] [2022-12-14 13:05:40,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:40,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:05:41,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:41,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65792014] [2022-12-14 13:05:41,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65792014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672451378] [2022-12-14 13:05:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:41,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:41,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:41,002 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:05:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:05:41,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:41,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672451378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:41,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:41,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:05:41,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236256891] [2022-12-14 13:05:41,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:41,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:41,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:41,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:41,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:41,200 INFO L87 Difference]: Start difference. First operand 21194 states and 31949 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:42,286 INFO L93 Difference]: Finished difference Result 63187 states and 96726 transitions. [2022-12-14 13:05:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 136 [2022-12-14 13:05:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:42,388 INFO L225 Difference]: With dead ends: 63187 [2022-12-14 13:05:42,388 INFO L226 Difference]: Without dead ends: 41998 [2022-12-14 13:05:42,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:05:42,431 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 255 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:42,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:42,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41998 states. [2022-12-14 13:05:43,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41998 to 41866. [2022-12-14 13:05:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41866 states, 35587 states have (on average 1.4999578497766037) internal successors, (53379), 35717 states have internal predecessors, (53379), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-12-14 13:05:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41866 states to 41866 states and 62861 transitions. [2022-12-14 13:05:43,878 INFO L78 Accepts]: Start accepts. Automaton has 41866 states and 62861 transitions. Word has length 136 [2022-12-14 13:05:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:43,878 INFO L495 AbstractCegarLoop]: Abstraction has 41866 states and 62861 transitions. [2022-12-14 13:05:43,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 13:05:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 41866 states and 62861 transitions. [2022-12-14 13:05:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:05:43,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:43,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:43,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:05:44,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 13:05:44,123 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1812651518, now seen corresponding path program 1 times [2022-12-14 13:05:44,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:44,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658572573] [2022-12-14 13:05:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 13:05:44,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:44,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658572573] [2022-12-14 13:05:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658572573] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:44,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:05:44,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 13:05:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911971241] [2022-12-14 13:05:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:44,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:05:44,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:05:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:05:44,547 INFO L87 Difference]: Start difference. First operand 41866 states and 62861 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:05:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:47,527 INFO L93 Difference]: Finished difference Result 146322 states and 219156 transitions. [2022-12-14 13:05:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:05:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-12-14 13:05:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:47,932 INFO L225 Difference]: With dead ends: 146322 [2022-12-14 13:05:47,932 INFO L226 Difference]: Without dead ends: 104462 [2022-12-14 13:05:48,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:05:48,036 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1148 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:48,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 747 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:05:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104462 states. [2022-12-14 13:05:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104462 to 82186. [2022-12-14 13:05:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82186 states, 69891 states have (on average 1.4944842683607331) internal successors, (104451), 70149 states have internal predecessors, (104451), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-12-14 13:05:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82186 states to 82186 states and 122893 transitions. [2022-12-14 13:05:51,033 INFO L78 Accepts]: Start accepts. Automaton has 82186 states and 122893 transitions. Word has length 136 [2022-12-14 13:05:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:51,033 INFO L495 AbstractCegarLoop]: Abstraction has 82186 states and 122893 transitions. [2022-12-14 13:05:51,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:05:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 82186 states and 122893 transitions. [2022-12-14 13:05:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 13:05:51,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:51,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 13:05:51,092 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:51,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1209041582, now seen corresponding path program 1 times [2022-12-14 13:05:51,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:51,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525558592] [2022-12-14 13:05:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:05:51,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525558592] [2022-12-14 13:05:51,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525558592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:51,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366061500] [2022-12-14 13:05:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:51,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:51,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:51,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:05:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 13:05:51,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366061500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:51,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:51,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:05:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336277765] [2022-12-14 13:05:51,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:51,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:51,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:51,484 INFO L87 Difference]: Start difference. First operand 82186 states and 122893 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:05:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:05:54,998 INFO L93 Difference]: Finished difference Result 145806 states and 222096 transitions. [2022-12-14 13:05:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:05:54,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 158 [2022-12-14 13:05:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:05:55,355 INFO L225 Difference]: With dead ends: 145806 [2022-12-14 13:05:55,355 INFO L226 Difference]: Without dead ends: 103818 [2022-12-14 13:05:55,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:55,470 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 126 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:05:55,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 631 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:05:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103818 states. [2022-12-14 13:05:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103818 to 97930. [2022-12-14 13:05:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97930 states, 85123 states have (on average 1.5368231852730754) internal successors, (130819), 85381 states have internal predecessors, (130819), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2022-12-14 13:05:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97930 states to 97930 states and 149773 transitions. [2022-12-14 13:05:58,995 INFO L78 Accepts]: Start accepts. Automaton has 97930 states and 149773 transitions. Word has length 158 [2022-12-14 13:05:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:05:58,996 INFO L495 AbstractCegarLoop]: Abstraction has 97930 states and 149773 transitions. [2022-12-14 13:05:58,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:05:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 97930 states and 149773 transitions. [2022-12-14 13:05:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 13:05:59,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:05:59,140 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:05:59,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:05:59,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:05:59,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:05:59,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:05:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 898919793, now seen corresponding path program 1 times [2022-12-14 13:05:59,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:05:59,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88077751] [2022-12-14 13:05:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:59,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:05:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:05:59,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:05:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88077751] [2022-12-14 13:05:59,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88077751] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:05:59,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150949646] [2022-12-14 13:05:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:05:59,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:05:59,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:05:59,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:05:59,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:05:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:05:59,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:05:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:05:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 13:05:59,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:05:59,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150949646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:05:59,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:05:59,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:05:59,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969717736] [2022-12-14 13:05:59,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:05:59,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:05:59,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:05:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:05:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:05:59,898 INFO L87 Difference]: Start difference. First operand 97930 states and 149773 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:05,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:05,528 INFO L93 Difference]: Finished difference Result 292243 states and 452374 transitions. [2022-12-14 13:06:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 208 [2022-12-14 13:06:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:06,130 INFO L225 Difference]: With dead ends: 292243 [2022-12-14 13:06:06,130 INFO L226 Difference]: Without dead ends: 194318 [2022-12-14 13:06:06,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:06,341 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 195 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:06,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:06:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194318 states. [2022-12-14 13:06:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194318 to 193546. [2022-12-14 13:06:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193546 states, 168451 states have (on average 1.5319054205674054) internal successors, (258051), 168965 states have internal predecessors, (258051), 18438 states have call successors, (18438), 6657 states have call predecessors, (18438), 6656 states have return successors, (18436), 17924 states have call predecessors, (18436), 18436 states have call successors, (18436) [2022-12-14 13:06:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193546 states to 193546 states and 294925 transitions. [2022-12-14 13:06:12,924 INFO L78 Accepts]: Start accepts. Automaton has 193546 states and 294925 transitions. Word has length 208 [2022-12-14 13:06:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:12,924 INFO L495 AbstractCegarLoop]: Abstraction has 193546 states and 294925 transitions. [2022-12-14 13:06:12,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 193546 states and 294925 transitions. [2022-12-14 13:06:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 13:06:13,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:13,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:13,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:06:13,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:13,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash -514810570, now seen corresponding path program 1 times [2022-12-14 13:06:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:13,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584778380] [2022-12-14 13:06:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:06:13,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584778380] [2022-12-14 13:06:13,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584778380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332495970] [2022-12-14 13:06:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:13,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:13,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:06:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:13,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:06:13,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:06:13,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:13,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332495970] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:13,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:13,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:06:13,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459745824] [2022-12-14 13:06:13,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:13,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:13,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:13,965 INFO L87 Difference]: Start difference. First operand 193546 states and 294925 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:24,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:06:24,591 INFO L93 Difference]: Finished difference Result 577555 states and 890390 transitions. [2022-12-14 13:06:24,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:06:24,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 208 [2022-12-14 13:06:24,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:06:25,714 INFO L225 Difference]: With dead ends: 577555 [2022-12-14 13:06:25,714 INFO L226 Difference]: Without dead ends: 384014 [2022-12-14 13:06:26,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:26,072 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 195 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:06:26,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:06:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384014 states. [2022-12-14 13:06:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384014 to 382474. [2022-12-14 13:06:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382474 states, 333315 states have (on average 1.5268769782338028) internal successors, (508931), 334341 states have internal predecessors, (508931), 35846 states have call successors, (35846), 13313 states have call predecessors, (35846), 13312 states have return successors, (35844), 34820 states have call predecessors, (35844), 35844 states have call successors, (35844) [2022-12-14 13:06:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382474 states to 382474 states and 580621 transitions. [2022-12-14 13:06:39,645 INFO L78 Accepts]: Start accepts. Automaton has 382474 states and 580621 transitions. Word has length 208 [2022-12-14 13:06:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:06:39,646 INFO L495 AbstractCegarLoop]: Abstraction has 382474 states and 580621 transitions. [2022-12-14 13:06:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:06:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 382474 states and 580621 transitions. [2022-12-14 13:06:40,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 13:06:40,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:06:40,467 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:06:40,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 13:06:40,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:40,669 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:06:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:06:40,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1155553347, now seen corresponding path program 1 times [2022-12-14 13:06:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:06:40,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844362903] [2022-12-14 13:06:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:06:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:06:40,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:06:40,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844362903] [2022-12-14 13:06:40,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844362903] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:06:40,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756581801] [2022-12-14 13:06:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:06:40,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:06:40,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:06:40,939 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:06:40,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:06:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:06:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:06:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:06:41,223 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 13:06:41,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:06:41,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756581801] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:06:41,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:06:41,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:06:41,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451402158] [2022-12-14 13:06:41,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:06:41,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:06:41,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:06:41,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:06:41,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:06:41,225 INFO L87 Difference]: Start difference. First operand 382474 states and 580621 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:07:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:07:03,868 INFO L93 Difference]: Finished difference Result 1141267 states and 1752086 transitions. [2022-12-14 13:07:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:07:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 208 [2022-12-14 13:07:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:07:06,360 INFO L225 Difference]: With dead ends: 1141267 [2022-12-14 13:07:06,361 INFO L226 Difference]: Without dead ends: 758798 [2022-12-14 13:07:07,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:07:07,188 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 195 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:07:07,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:07:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758798 states. [2022-12-14 13:07:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758798 to 755722. [2022-12-14 13:07:32,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755722 states, 659459 states have (on average 1.5217367569477405) internal successors, (1003523), 661509 states have internal predecessors, (1003523), 69638 states have call successors, (69638), 26625 states have call predecessors, (69638), 26624 states have return successors, (69636), 67588 states have call predecessors, (69636), 69636 states have call successors, (69636) [2022-12-14 13:07:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755722 states to 755722 states and 1142797 transitions. [2022-12-14 13:07:35,454 INFO L78 Accepts]: Start accepts. Automaton has 755722 states and 1142797 transitions. Word has length 208 [2022-12-14 13:07:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:07:35,455 INFO L495 AbstractCegarLoop]: Abstraction has 755722 states and 1142797 transitions. [2022-12-14 13:07:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:07:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 755722 states and 1142797 transitions. [2022-12-14 13:07:37,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-14 13:07:37,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:07:37,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:07:37,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:07:37,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:07:37,241 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:07:37,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:07:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1360694228, now seen corresponding path program 1 times [2022-12-14 13:07:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:07:37,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166191703] [2022-12-14 13:07:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:07:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:07:37,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:07:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166191703] [2022-12-14 13:07:37,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166191703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:07:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688640962] [2022-12-14 13:07:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:07:37,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:07:37,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:07:37,493 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:07:37,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c8c329a-b7fd-4410-86d9-9a0703b32add/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:07:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:07:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:07:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:07:37,721 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 13:07:37,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:07:37,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688640962] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:07:37,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:07:37,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 13:07:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966894571] [2022-12-14 13:07:37,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:07:37,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:07:37,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:07:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:07:37,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:07:37,723 INFO L87 Difference]: Start difference. First operand 755722 states and 1142797 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:08:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:24,938 INFO L93 Difference]: Finished difference Result 2254867 states and 3446806 transitions. [2022-12-14 13:08:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:24,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 208 [2022-12-14 13:08:24,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:30,241 INFO L225 Difference]: With dead ends: 2254867 [2022-12-14 13:08:30,241 INFO L226 Difference]: Without dead ends: 1499150 [2022-12-14 13:08:32,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:08:32,297 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 195 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:32,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 498 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:08:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499150 states. [2022-12-14 13:09:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499150 to 1493002. [2022-12-14 13:09:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493002 states, 1304579 states have (on average 1.516482328781929) internal successors, (1978371), 1308677 states have internal predecessors, (1978371), 135174 states have call successors, (135174), 53249 states have call predecessors, (135174), 53248 states have return successors, (135172), 131076 states have call predecessors, (135172), 135172 states have call successors, (135172)