./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/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_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/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_09fc23b6-7588-46bf-bb87-51830d79335c/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 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 --- 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 13:59:30,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:59:30,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:59:30,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:59:30,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:59:30,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:59:30,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:59:30,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:59:30,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:59:30,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:59:30,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:59:30,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:59:30,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:59:30,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:59:30,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:59:30,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:59:30,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:59:30,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:59:30,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:59:30,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:59:30,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:59:30,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:59:30,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:59:30,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:59:30,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:59:30,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:59:30,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:59:30,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:59:30,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:59:30,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:59:30,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:59:30,600 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:59:30,601 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:59:30,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:59:30,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:59:30,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:59:30,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:59:30,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:59:30,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:59:30,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:59:30,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:59:30,606 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:59:30,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:59:30,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:59:30,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:59:30,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:59:30,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:59:30,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:59:30,629 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:59:30,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:59:30,629 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:59:30,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:59:30,629 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:59:30,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:59:30,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:59:30,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:59:30,630 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:59:30,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:59:30,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:59:30,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:59:30,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:59:30,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:59:30,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:59:30,633 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:59:30,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:59:30,633 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:59:30,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:59:30,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:59:30,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:59:30,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:59:30,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:59:30,634 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:59:30,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:59:30,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:59:30,635 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:59:30,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:59:30,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:59:30,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:59:30,636 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_09fc23b6-7588-46bf-bb87-51830d79335c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ff0d99c6257365cafb7459615c8e1194d53bcc0d71dc100705abd4bb2d65c37 [2022-12-14 13:59:30,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:59:30,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:59:30,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:59:30,853 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:59:30,854 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:59:30,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2022-12-14 13:59:33,517 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:59:33,675 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:59:33,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/sv-benchmarks/c/systemc/token_ring.06.cil-1.c [2022-12-14 13:59:33,686 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/data/3bd1aeae6/388b4101ba5e4dbfb008679ed2ad3f53/FLAGc519866bd [2022-12-14 13:59:33,699 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/data/3bd1aeae6/388b4101ba5e4dbfb008679ed2ad3f53 [2022-12-14 13:59:33,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:59:33,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:59:33,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:59:33,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:59:33,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:59:33,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:59:33" (1/1) ... [2022-12-14 13:59:33,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f12c5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:33, skipping insertion in model container [2022-12-14 13:59:33,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:59:33" (1/1) ... [2022-12-14 13:59:33,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:59:33,749 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:59:33,844 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_09fc23b6-7588-46bf-bb87-51830d79335c/sv-benchmarks/c/systemc/token_ring.06.cil-1.c[671,684] [2022-12-14 13:59:33,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:59:33,938 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:59:33,948 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_09fc23b6-7588-46bf-bb87-51830d79335c/sv-benchmarks/c/systemc/token_ring.06.cil-1.c[671,684] [2022-12-14 13:59:33,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:59:34,010 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:59:34,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34 WrapperNode [2022-12-14 13:59:34,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:59:34,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:59:34,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:59:34,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:59:34,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,033 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,067 INFO L138 Inliner]: procedures = 40, calls = 50, calls flagged for inlining = 23, calls inlined = 23, statements flattened = 510 [2022-12-14 13:59:34,067 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:59:34,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:59:34,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:59:34,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:59:34,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,081 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:59:34,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:59:34,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:59:34,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:59:34,114 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (1/1) ... [2022-12-14 13:59:34,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:59:34,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:34,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:59:34,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:59:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:59:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 13:59:34,167 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 13:59:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 13:59:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:59:34,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:59:34,239 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:59:34,240 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:59:34,681 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:59:34,927 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:59:34,927 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-14 13:59:34,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:59:34 BoogieIcfgContainer [2022-12-14 13:59:34,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:59:34,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:59:34,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:59:34,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:59:34,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:59:33" (1/3) ... [2022-12-14 13:59:34,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300407c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:59:34, skipping insertion in model container [2022-12-14 13:59:34,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:59:34" (2/3) ... [2022-12-14 13:59:34,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300407c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:59:34, skipping insertion in model container [2022-12-14 13:59:34,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:59:34" (3/3) ... [2022-12-14 13:59:34,937 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.06.cil-1.c [2022-12-14 13:59:34,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:59:34,952 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:59:34,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:59:35,001 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;@78d37c6c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:59:35,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:59:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 97 states have (on average 1.5463917525773196) internal successors, (150), 101 states have internal predecessors, (150), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 13:59:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 13:59:35,014 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:35,015 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] [2022-12-14 13:59:35,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:35,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:35,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1452949449, now seen corresponding path program 1 times [2022-12-14 13:59:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:35,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25089224] [2022-12-14 13:59:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:35,290 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 13:59:35,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25089224] [2022-12-14 13:59:35,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25089224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:35,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:59:35,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:59:35,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565631766] [2022-12-14 13:59:35,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:59:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:59:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:59:35,328 INFO L87 Difference]: Start difference. First operand has 128 states, 97 states have (on average 1.5463917525773196) internal successors, (150), 101 states have internal predecessors, (150), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 13:59:35,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:35,619 INFO L93 Difference]: Finished difference Result 361 states and 558 transitions. [2022-12-14 13:59:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 13:59:35,621 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 49 [2022-12-14 13:59:35,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:35,631 INFO L225 Difference]: With dead ends: 361 [2022-12-14 13:59:35,631 INFO L226 Difference]: Without dead ends: 234 [2022-12-14 13:59:35,635 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 13:59:35,638 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 322 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:35,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 486 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:59:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-14 13:59:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-12-14 13:59:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 182 states have (on average 1.4835164835164836) internal successors, (270), 185 states have internal predecessors, (270), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 13:59:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 344 transitions. [2022-12-14 13:59:35,697 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 344 transitions. Word has length 49 [2022-12-14 13:59:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:35,698 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 344 transitions. [2022-12-14 13:59:35,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 13:59:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 344 transitions. [2022-12-14 13:59:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:59:35,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:35,702 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:35,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:59:35,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:35,704 INFO L85 PathProgramCache]: Analyzing trace with hash -427290522, now seen corresponding path program 1 times [2022-12-14 13:59:35,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:35,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972396767] [2022-12-14 13:59:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:59:35,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972396767] [2022-12-14 13:59:35,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972396767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427130443] [2022-12-14 13:59:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:35,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:35,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:59:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:59:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:59:36,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:36,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427130443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:36,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:36,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:59:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792016079] [2022-12-14 13:59:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:36,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:36,100 INFO L87 Difference]: Start difference. First operand 233 states and 344 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 13:59:36,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:36,213 INFO L93 Difference]: Finished difference Result 682 states and 1023 transitions. [2022-12-14 13:59:36,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:36,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 94 [2022-12-14 13:59:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:36,219 INFO L225 Difference]: With dead ends: 682 [2022-12-14 13:59:36,219 INFO L226 Difference]: Without dead ends: 454 [2022-12-14 13:59:36,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:36,222 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 159 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:36,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 343 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-12-14 13:59:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 448. [2022-12-14 13:59:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 355 states have (on average 1.4788732394366197) internal successors, (525), 359 states have internal predecessors, (525), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 13:59:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 659 transitions. [2022-12-14 13:59:36,264 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 659 transitions. Word has length 94 [2022-12-14 13:59:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:36,264 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 659 transitions. [2022-12-14 13:59:36,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 13:59:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 659 transitions. [2022-12-14 13:59:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:59:36,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:36,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:36,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:59:36,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:36,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:36,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2051007610, now seen corresponding path program 1 times [2022-12-14 13:59:36,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:36,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387688334] [2022-12-14 13:59:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:36,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 13:59:36,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:36,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387688334] [2022-12-14 13:59:36,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387688334] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:36,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107223264] [2022-12-14 13:59:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:36,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:36,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:36,687 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:36,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:59:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:36,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:59:36,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:59:36,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:36,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107223264] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:36,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:36,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 13:59:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166465306] [2022-12-14 13:59:36,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:36,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:36,852 INFO L87 Difference]: Start difference. First operand 448 states and 659 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 13:59:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:36,963 INFO L93 Difference]: Finished difference Result 1321 states and 1974 transitions. [2022-12-14 13:59:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 94 [2022-12-14 13:59:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:36,967 INFO L225 Difference]: With dead ends: 1321 [2022-12-14 13:59:36,967 INFO L226 Difference]: Without dead ends: 878 [2022-12-14 13:59:36,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:36,969 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 162 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:36,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 342 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-12-14 13:59:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 870. [2022-12-14 13:59:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 695 states have (on average 1.4719424460431654) internal successors, (1023), 701 states have internal predecessors, (1023), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-14 13:59:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1273 transitions. [2022-12-14 13:59:37,010 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1273 transitions. Word has length 94 [2022-12-14 13:59:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:37,010 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1273 transitions. [2022-12-14 13:59:37,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 13:59:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1273 transitions. [2022-12-14 13:59:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:59:37,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:37,013 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:37,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:59:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:37,214 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash 9878630, now seen corresponding path program 1 times [2022-12-14 13:59:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:37,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369360490] [2022-12-14 13:59:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:37,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:37,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 13:59:37,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:37,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369360490] [2022-12-14 13:59:37,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369360490] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:37,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350840314] [2022-12-14 13:59:37,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:37,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:37,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:37,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:59:37,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:59:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 13:59:37,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:37,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350840314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:37,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:37,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 13:59:37,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403843454] [2022-12-14 13:59:37,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:37,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:37,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:37,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:37,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 13:59:37,429 INFO L87 Difference]: Start difference. First operand 870 states and 1273 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 13:59:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:37,552 INFO L93 Difference]: Finished difference Result 2575 states and 3826 transitions. [2022-12-14 13:59:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 94 [2022-12-14 13:59:37,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:37,560 INFO L225 Difference]: With dead ends: 2575 [2022-12-14 13:59:37,560 INFO L226 Difference]: Without dead ends: 1710 [2022-12-14 13:59:37,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 95 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 13:59:37,563 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 153 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:37,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 310 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-12-14 13:59:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1698. [2022-12-14 13:59:37,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1363 states have (on average 1.4636830520909758) internal successors, (1995), 1373 states have internal predecessors, (1995), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-12-14 13:59:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2469 transitions. [2022-12-14 13:59:37,662 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2469 transitions. Word has length 94 [2022-12-14 13:59:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:37,663 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2469 transitions. [2022-12-14 13:59:37,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 13:59:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2469 transitions. [2022-12-14 13:59:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:59:37,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:37,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:37,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:59:37,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:37,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:37,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1090363270, now seen corresponding path program 1 times [2022-12-14 13:59:37,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:37,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299638513] [2022-12-14 13:59:37,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:37,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:59:37,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:37,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299638513] [2022-12-14 13:59:37,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299638513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:37,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:59:37,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:59:37,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39338444] [2022-12-14 13:59:37,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:37,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:37,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:37,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:37,949 INFO L87 Difference]: Start difference. First operand 1698 states and 2469 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:59:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:38,093 INFO L93 Difference]: Finished difference Result 3014 states and 4456 transitions. [2022-12-14 13:59:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:38,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2022-12-14 13:59:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:38,103 INFO L225 Difference]: With dead ends: 3014 [2022-12-14 13:59:38,104 INFO L226 Difference]: Without dead ends: 2138 [2022-12-14 13:59:38,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:38,107 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 74 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:38,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 389 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2022-12-14 13:59:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1982. [2022-12-14 13:59:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1631 states have (on average 1.5027590435315756) internal successors, (2451), 1641 states have internal predecessors, (2451), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-12-14 13:59:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 2941 transitions. [2022-12-14 13:59:38,234 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 2941 transitions. Word has length 94 [2022-12-14 13:59:38,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:38,234 INFO L495 AbstractCegarLoop]: Abstraction has 1982 states and 2941 transitions. [2022-12-14 13:59:38,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 13:59:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 2941 transitions. [2022-12-14 13:59:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:59:38,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:38,244 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, 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 13:59:38,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:59:38,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1530744369, now seen corresponding path program 1 times [2022-12-14 13:59:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:38,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633281180] [2022-12-14 13:59:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:59:38,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633281180] [2022-12-14 13:59:38,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633281180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:38,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:59:38,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:59:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922033131] [2022-12-14 13:59:38,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:38,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:38,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:38,343 INFO L87 Difference]: Start difference. First operand 1982 states and 2941 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:38,596 INFO L93 Difference]: Finished difference Result 5863 states and 8798 transitions. [2022-12-14 13:59:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:38,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 13:59:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:38,617 INFO L225 Difference]: With dead ends: 5863 [2022-12-14 13:59:38,617 INFO L226 Difference]: Without dead ends: 3886 [2022-12-14 13:59:38,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:38,622 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 151 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:38,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 312 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2022-12-14 13:59:38,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3858. [2022-12-14 13:59:38,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3179 states have (on average 1.4907203523120478) internal successors, (4739), 3197 states have internal predecessors, (4739), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-12-14 13:59:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 5677 transitions. [2022-12-14 13:59:38,815 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 5677 transitions. Word has length 126 [2022-12-14 13:59:38,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:38,815 INFO L495 AbstractCegarLoop]: Abstraction has 3858 states and 5677 transitions. [2022-12-14 13:59:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 5677 transitions. [2022-12-14 13:59:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:59:38,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:38,825 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, 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 13:59:38,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 13:59:38,825 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:38,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:38,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1916491156, now seen corresponding path program 1 times [2022-12-14 13:59:38,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:38,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39045130] [2022-12-14 13:59:38,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:38,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:59:38,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:38,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39045130] [2022-12-14 13:59:38,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39045130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:38,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:59:38,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:59:38,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639667491] [2022-12-14 13:59:38,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:38,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:38,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:38,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:38,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:38,902 INFO L87 Difference]: Start difference. First operand 3858 states and 5677 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:39,177 INFO L93 Difference]: Finished difference Result 11419 states and 16982 transitions. [2022-12-14 13:59:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 13:59:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:39,200 INFO L225 Difference]: With dead ends: 11419 [2022-12-14 13:59:39,200 INFO L226 Difference]: Without dead ends: 7566 [2022-12-14 13:59:39,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:39,209 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 153 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:39,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 312 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:39,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7566 states. [2022-12-14 13:59:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7566 to 7514. [2022-12-14 13:59:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 6195 states have (on average 1.4778046811945118) internal successors, (9155), 6229 states have internal predecessors, (9155), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-12-14 13:59:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 10957 transitions. [2022-12-14 13:59:39,485 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 10957 transitions. Word has length 126 [2022-12-14 13:59:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:39,485 INFO L495 AbstractCegarLoop]: Abstraction has 7514 states and 10957 transitions. [2022-12-14 13:59:39,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 10957 transitions. [2022-12-14 13:59:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 13:59:39,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:39,499 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, 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 13:59:39,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:59:39,499 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1169435187, now seen corresponding path program 1 times [2022-12-14 13:59:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429065153] [2022-12-14 13:59:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:39,556 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 13:59:39,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429065153] [2022-12-14 13:59:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429065153] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:39,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:59:39,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:59:39,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928614666] [2022-12-14 13:59:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:39,559 INFO L87 Difference]: Start difference. First operand 7514 states and 10957 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:40,197 INFO L93 Difference]: Finished difference Result 22243 states and 32758 transitions. [2022-12-14 13:59:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:40,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 13:59:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:40,270 INFO L225 Difference]: With dead ends: 22243 [2022-12-14 13:59:40,270 INFO L226 Difference]: Without dead ends: 14734 [2022-12-14 13:59:40,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:59:40,298 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 156 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:40,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 332 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14734 states. [2022-12-14 13:59:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14734 to 14634. [2022-12-14 13:59:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14634 states, 12067 states have (on average 1.4640755780227066) internal successors, (17667), 12133 states have internal predecessors, (17667), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-12-14 13:59:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14634 states to 14634 states and 21133 transitions. [2022-12-14 13:59:41,041 INFO L78 Accepts]: Start accepts. Automaton has 14634 states and 21133 transitions. Word has length 126 [2022-12-14 13:59:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:41,042 INFO L495 AbstractCegarLoop]: Abstraction has 14634 states and 21133 transitions. [2022-12-14 13:59:41,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 13:59:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14634 states and 21133 transitions. [2022-12-14 13:59:41,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:59:41,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:41,121 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, 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] [2022-12-14 13:59:41,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:59:41,122 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:41,122 INFO L85 PathProgramCache]: Analyzing trace with hash 273282116, now seen corresponding path program 1 times [2022-12-14 13:59:41,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:41,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23894263] [2022-12-14 13:59:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:41,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:59:41,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23894263] [2022-12-14 13:59:41,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23894263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:41,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157460556] [2022-12-14 13:59:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:41,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:41,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:41,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:41,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:59:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:59:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 13:59:41,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:41,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157460556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:41,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:41,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:59:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351052606] [2022-12-14 13:59:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:59:41,607 INFO L87 Difference]: Start difference. First operand 14634 states and 21133 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:42,230 INFO L93 Difference]: Finished difference Result 22210 states and 32627 transitions. [2022-12-14 13:59:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-12-14 13:59:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:42,267 INFO L225 Difference]: With dead ends: 22210 [2022-12-14 13:59:42,268 INFO L226 Difference]: Without dead ends: 14702 [2022-12-14 13:59:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 13:59:42,285 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 148 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:42,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 417 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:42,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14702 states. [2022-12-14 13:59:42,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14702 to 14570. [2022-12-14 13:59:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14570 states, 12003 states have (on average 1.4452220278263768) internal successors, (17347), 12069 states have internal predecessors, (17347), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-12-14 13:59:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14570 states to 14570 states and 20813 transitions. [2022-12-14 13:59:42,886 INFO L78 Accepts]: Start accepts. Automaton has 14570 states and 20813 transitions. Word has length 145 [2022-12-14 13:59:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:42,887 INFO L495 AbstractCegarLoop]: Abstraction has 14570 states and 20813 transitions. [2022-12-14 13:59:42,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 14570 states and 20813 transitions. [2022-12-14 13:59:42,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 13:59:42,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:42,923 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, 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] [2022-12-14 13:59:42,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:59:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:43,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:43,125 INFO L85 PathProgramCache]: Analyzing trace with hash 370979142, now seen corresponding path program 1 times [2022-12-14 13:59:43,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:43,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914450560] [2022-12-14 13:59:43,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:43,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:59:43,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914450560] [2022-12-14 13:59:43,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914450560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118794107] [2022-12-14 13:59:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:43,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:43,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:59:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:43,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:59:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 13:59:43,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:43,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118794107] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:43,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:43,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:59:43,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082623818] [2022-12-14 13:59:43,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:43,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:59:43,686 INFO L87 Difference]: Start difference. First operand 14570 states and 20813 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:59:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:44,237 INFO L93 Difference]: Finished difference Result 25752 states and 36298 transitions. [2022-12-14 13:59:44,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:44,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 13:59:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:44,285 INFO L225 Difference]: With dead ends: 25752 [2022-12-14 13:59:44,285 INFO L226 Difference]: Without dead ends: 18340 [2022-12-14 13:59:44,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 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 13:59:44,335 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 159 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:44,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 213 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:59:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18340 states. [2022-12-14 13:59:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18340 to 18340. [2022-12-14 13:59:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18340 states, 15393 states have (on average 1.3970636003378158) internal successors, (21505), 15459 states have internal predecessors, (21505), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2022-12-14 13:59:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18340 states to 18340 states and 25223 transitions. [2022-12-14 13:59:44,899 INFO L78 Accepts]: Start accepts. Automaton has 18340 states and 25223 transitions. Word has length 145 [2022-12-14 13:59:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:44,899 INFO L495 AbstractCegarLoop]: Abstraction has 18340 states and 25223 transitions. [2022-12-14 13:59:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:59:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 18340 states and 25223 transitions. [2022-12-14 13:59:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:59:44,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:44,927 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, 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 13:59:44,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:59:45,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:59:45,128 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1540038815, now seen corresponding path program 1 times [2022-12-14 13:59:45,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624261227] [2022-12-14 13:59:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:45,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:59:45,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624261227] [2022-12-14 13:59:45,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624261227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:45,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727166008] [2022-12-14 13:59:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:45,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:45,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:45,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:59:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:59:45,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:59:45,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727166008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:45,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:45,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:59:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89205610] [2022-12-14 13:59:45,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:59:45,481 INFO L87 Difference]: Start difference. First operand 18340 states and 25223 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:46,285 INFO L93 Difference]: Finished difference Result 27804 states and 38925 transitions. [2022-12-14 13:59:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2022-12-14 13:59:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:46,330 INFO L225 Difference]: With dead ends: 27804 [2022-12-14 13:59:46,331 INFO L226 Difference]: Without dead ends: 18408 [2022-12-14 13:59:46,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 13:59:46,354 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 140 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:46,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 423 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18408 states. [2022-12-14 13:59:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18408 to 18276. [2022-12-14 13:59:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18276 states, 15329 states have (on average 1.3778459129754062) internal successors, (21121), 15395 states have internal predecessors, (21121), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2022-12-14 13:59:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18276 states to 18276 states and 24839 transitions. [2022-12-14 13:59:47,036 INFO L78 Accepts]: Start accepts. Automaton has 18276 states and 24839 transitions. Word has length 146 [2022-12-14 13:59:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:47,037 INFO L495 AbstractCegarLoop]: Abstraction has 18276 states and 24839 transitions. [2022-12-14 13:59:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 18276 states and 24839 transitions. [2022-12-14 13:59:47,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:59:47,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:47,062 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, 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, 1, 1, 1, 1] [2022-12-14 13:59:47,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:59:47,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:47,263 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:47,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:47,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1339934337, now seen corresponding path program 1 times [2022-12-14 13:59:47,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:47,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44816353] [2022-12-14 13:59:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:47,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:59:47,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44816353] [2022-12-14 13:59:47,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44816353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:47,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441631119] [2022-12-14 13:59:47,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:47,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:47,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:47,419 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:47,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:59:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:59:47,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:59:47,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:47,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441631119] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:47,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:47,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 13:59:47,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639339034] [2022-12-14 13:59:47,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:47,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 13:59:47,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:47,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 13:59:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 13:59:47,612 INFO L87 Difference]: Start difference. First operand 18276 states and 24839 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:59:48,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:48,763 INFO L93 Difference]: Finished difference Result 55482 states and 75323 transitions. [2022-12-14 13:59:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:59:48,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2022-12-14 13:59:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:48,859 INFO L225 Difference]: With dead ends: 55482 [2022-12-14 13:59:48,859 INFO L226 Difference]: Without dead ends: 37212 [2022-12-14 13:59:48,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:59:48,889 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 176 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 751 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37212 states. [2022-12-14 13:59:50,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37212 to 37144. [2022-12-14 13:59:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37144 states, 31261 states have (on average 1.3674866447010652) internal successors, (42749), 31455 states have internal predecessors, (42749), 3648 states have call successors, (3648), 2171 states have call predecessors, (3648), 2234 states have return successors, (3838), 3518 states have call predecessors, (3838), 3646 states have call successors, (3838) [2022-12-14 13:59:50,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37144 states to 37144 states and 50235 transitions. [2022-12-14 13:59:50,666 INFO L78 Accepts]: Start accepts. Automaton has 37144 states and 50235 transitions. Word has length 146 [2022-12-14 13:59:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:50,666 INFO L495 AbstractCegarLoop]: Abstraction has 37144 states and 50235 transitions. [2022-12-14 13:59:50,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 13:59:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 37144 states and 50235 transitions. [2022-12-14 13:59:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:59:50,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:50,744 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, 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, 1] [2022-12-14 13:59:50,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:59:50,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:59:50,944 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash -500412250, now seen corresponding path program 1 times [2022-12-14 13:59:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:50,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586557052] [2022-12-14 13:59:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:59:51,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586557052] [2022-12-14 13:59:51,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586557052] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597300802] [2022-12-14 13:59:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:51,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:51,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:51,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:51,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:59:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:51,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:59:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 13:59:51,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:51,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597300802] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:51,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:51,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 13:59:51,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486285911] [2022-12-14 13:59:51,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:51,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:51,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:51,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:59:51,279 INFO L87 Difference]: Start difference. First operand 37144 states and 50235 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:59:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:52,881 INFO L93 Difference]: Finished difference Result 86628 states and 119008 transitions. [2022-12-14 13:59:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-12-14 13:59:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:53,014 INFO L225 Difference]: With dead ends: 86628 [2022-12-14 13:59:53,015 INFO L226 Difference]: Without dead ends: 49490 [2022-12-14 13:59:53,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 13:59:53,071 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 84 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:53,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 320 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49490 states. [2022-12-14 13:59:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49490 to 40932. [2022-12-14 13:59:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40932 states, 34787 states have (on average 1.394630177940035) internal successors, (48515), 34983 states have internal predecessors, (48515), 3779 states have call successors, (3779), 2302 states have call predecessors, (3779), 2365 states have return successors, (3969), 3647 states have call predecessors, (3969), 3777 states have call successors, (3969) [2022-12-14 13:59:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40932 states to 40932 states and 56263 transitions. [2022-12-14 13:59:54,896 INFO L78 Accepts]: Start accepts. Automaton has 40932 states and 56263 transitions. Word has length 146 [2022-12-14 13:59:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:54,896 INFO L495 AbstractCegarLoop]: Abstraction has 40932 states and 56263 transitions. [2022-12-14 13:59:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 13:59:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 40932 states and 56263 transitions. [2022-12-14 13:59:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 13:59:54,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:54,950 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, 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, 1] [2022-12-14 13:59:54,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 13:59:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:55,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1505285755, now seen corresponding path program 2 times [2022-12-14 13:59:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913896147] [2022-12-14 13:59:55,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:55,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:59:55,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:59:55,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913896147] [2022-12-14 13:59:55,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913896147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:59:55,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144206000] [2022-12-14 13:59:55,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:59:55,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:59:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:59:55,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:59:55,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:59:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:59:55,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:59:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 13:59:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:59:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 13:59:55,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:59:55,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144206000] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:59:55,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:59:55,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 13:59:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268598820] [2022-12-14 13:59:55,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:59:55,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:59:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:59:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:59:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:55,377 INFO L87 Difference]: Start difference. First operand 40932 states and 56263 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:59:57,656 INFO L93 Difference]: Finished difference Result 78630 states and 109345 transitions. [2022-12-14 13:59:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:59:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2022-12-14 13:59:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:59:57,792 INFO L225 Difference]: With dead ends: 78630 [2022-12-14 13:59:57,793 INFO L226 Difference]: Without dead ends: 57890 [2022-12-14 13:59:57,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 13:59:57,840 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 117 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:59:57,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 415 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:59:57,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57890 states. [2022-12-14 13:59:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57890 to 48100. [2022-12-14 13:59:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48100 states, 41443 states have (on average 1.4331732741355596) internal successors, (59395), 41639 states have internal predecessors, (59395), 4035 states have call successors, (4035), 2558 states have call predecessors, (4035), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-12-14 13:59:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48100 states to 48100 states and 67655 transitions. [2022-12-14 13:59:59,565 INFO L78 Accepts]: Start accepts. Automaton has 48100 states and 67655 transitions. Word has length 146 [2022-12-14 13:59:59,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:59:59,566 INFO L495 AbstractCegarLoop]: Abstraction has 48100 states and 67655 transitions. [2022-12-14 13:59:59,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 13:59:59,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48100 states and 67655 transitions. [2022-12-14 13:59:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 13:59:59,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:59:59,628 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, 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, 1] [2022-12-14 13:59:59,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:59:59,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:59:59,828 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:59:59,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:59:59,829 INFO L85 PathProgramCache]: Analyzing trace with hash 903862114, now seen corresponding path program 1 times [2022-12-14 13:59:59,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:59:59,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642944649] [2022-12-14 13:59:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:59:59,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:59:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:59:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 13:59:59,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642944649] [2022-12-14 14:00:00,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642944649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:00,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778342651] [2022-12-14 14:00:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:00,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:00,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:00,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:00:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:00:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:00:00,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:00,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778342651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:00,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:00,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 14:00:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310268032] [2022-12-14 14:00:00,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:00,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:00:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:00,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:00:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:00:00,228 INFO L87 Difference]: Start difference. First operand 48100 states and 67655 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:03,061 INFO L93 Difference]: Finished difference Result 119092 states and 167429 transitions. [2022-12-14 14:00:03,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:00:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 14:00:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:03,245 INFO L225 Difference]: With dead ends: 119092 [2022-12-14 14:00:03,245 INFO L226 Difference]: Without dead ends: 70998 [2022-12-14 14:00:03,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:00:03,311 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 455 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:03,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 427 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:00:03,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70998 states. [2022-12-14 14:00:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70998 to 70994. [2022-12-14 14:00:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70994 states, 61085 states have (on average 1.4203978063354343) internal successors, (86765), 61377 states have internal predecessors, (86765), 5981 states have call successors, (5981), 3832 states have call predecessors, (5981), 3927 states have return successors, (6267), 5785 states have call predecessors, (6267), 5979 states have call successors, (6267) [2022-12-14 14:00:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70994 states to 70994 states and 99013 transitions. [2022-12-14 14:00:06,458 INFO L78 Accepts]: Start accepts. Automaton has 70994 states and 99013 transitions. Word has length 147 [2022-12-14 14:00:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:06,458 INFO L495 AbstractCegarLoop]: Abstraction has 70994 states and 99013 transitions. [2022-12-14 14:00:06,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 70994 states and 99013 transitions. [2022-12-14 14:00:06,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:00:06,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:06,555 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, 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, 1] [2022-12-14 14:00:06,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 14:00:06,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:00:06,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash -277927588, now seen corresponding path program 1 times [2022-12-14 14:00:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110109731] [2022-12-14 14:00:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:06,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:00:06,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110109731] [2022-12-14 14:00:06,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110109731] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159034529] [2022-12-14 14:00:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:06,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:06,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:06,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:06,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:00:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:00:07,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:00:07,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:07,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159034529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:07,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:07,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 14:00:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077143033] [2022-12-14 14:00:07,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:00:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:00:07,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:00:07,132 INFO L87 Difference]: Start difference. First operand 70994 states and 99013 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:11,581 INFO L93 Difference]: Finished difference Result 175462 states and 244399 transitions. [2022-12-14 14:00:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:00:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2022-12-14 14:00:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:11,845 INFO L225 Difference]: With dead ends: 175462 [2022-12-14 14:00:11,846 INFO L226 Difference]: Without dead ends: 104474 [2022-12-14 14:00:11,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:00:11,940 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 514 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:11,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 369 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:00:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104474 states. [2022-12-14 14:00:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104474 to 104470. [2022-12-14 14:00:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104470 states, 89721 states have (on average 1.4052562945129903) internal successors, (126081), 90157 states have internal predecessors, (126081), 8865 states have call successors, (8865), 5740 states have call predecessors, (8865), 5883 states have return successors, (9295), 8573 states have call predecessors, (9295), 8863 states have call successors, (9295) [2022-12-14 14:00:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104470 states to 104470 states and 144241 transitions. [2022-12-14 14:00:16,838 INFO L78 Accepts]: Start accepts. Automaton has 104470 states and 144241 transitions. Word has length 149 [2022-12-14 14:00:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:16,839 INFO L495 AbstractCegarLoop]: Abstraction has 104470 states and 144241 transitions. [2022-12-14 14:00:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:16,839 INFO L276 IsEmpty]: Start isEmpty. Operand 104470 states and 144241 transitions. [2022-12-14 14:00:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 14:00:16,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:16,979 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, 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, 1, 1, 1] [2022-12-14 14:00:16,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:00:17,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:00:17,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1799996493, now seen corresponding path program 1 times [2022-12-14 14:00:17,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:17,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656945362] [2022-12-14 14:00:17,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:17,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 14:00:17,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656945362] [2022-12-14 14:00:17,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656945362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144305667] [2022-12-14 14:00:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:17,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:17,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:17,269 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:17,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:00:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:17,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:00:17,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:00:17,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:17,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144305667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:17,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:17,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:00:17,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610052305] [2022-12-14 14:00:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:00:17,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:00:17,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:00:17,580 INFO L87 Difference]: Start difference. First operand 104470 states and 144241 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:00:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:23,023 INFO L93 Difference]: Finished difference Result 201854 states and 281499 transitions. [2022-12-14 14:00:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:00:23,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 148 [2022-12-14 14:00:23,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:23,330 INFO L225 Difference]: With dead ends: 201854 [2022-12-14 14:00:23,330 INFO L226 Difference]: Without dead ends: 132174 [2022-12-14 14:00:23,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:00:23,428 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 110 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:23,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 409 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:00:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132174 states. [2022-12-14 14:00:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132174 to 118774. [2022-12-14 14:00:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118774 states, 102873 states have (on average 1.4262342888804642) internal successors, (146721), 103309 states have internal predecessors, (146721), 9441 states have call successors, (9441), 6316 states have call predecessors, (9441), 6459 states have return successors, (9871), 9149 states have call predecessors, (9871), 9439 states have call successors, (9871) [2022-12-14 14:00:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118774 states to 118774 states and 166033 transitions. [2022-12-14 14:00:28,789 INFO L78 Accepts]: Start accepts. Automaton has 118774 states and 166033 transitions. Word has length 148 [2022-12-14 14:00:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:28,789 INFO L495 AbstractCegarLoop]: Abstraction has 118774 states and 166033 transitions. [2022-12-14 14:00:28,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:00:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 118774 states and 166033 transitions. [2022-12-14 14:00:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:00:28,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:28,939 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, 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, 1] [2022-12-14 14:00:28,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 14:00:29,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:00:29,140 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1825329474, now seen corresponding path program 1 times [2022-12-14 14:00:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:29,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056662987] [2022-12-14 14:00:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:29,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:00:29,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056662987] [2022-12-14 14:00:29,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056662987] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:29,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175884198] [2022-12-14 14:00:29,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:29,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:29,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:29,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:29,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:00:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:00:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 14:00:29,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:29,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175884198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:29,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:29,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 14:00:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602024668] [2022-12-14 14:00:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:29,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:00:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:00:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:00:29,646 INFO L87 Difference]: Start difference. First operand 118774 states and 166033 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:34,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:34,283 INFO L93 Difference]: Finished difference Result 212882 states and 296414 transitions. [2022-12-14 14:00:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:00:34,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2022-12-14 14:00:34,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:34,478 INFO L225 Difference]: With dead ends: 212882 [2022-12-14 14:00:34,478 INFO L226 Difference]: Without dead ends: 94114 [2022-12-14 14:00:34,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:00:34,594 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 461 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:34,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 452 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:00:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94114 states. [2022-12-14 14:00:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94114 to 91001. [2022-12-14 14:00:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91001 states, 78843 states have (on average 1.4204051088872822) internal successors, (111989), 79206 states have internal predecessors, (111989), 7127 states have call successors, (7127), 4743 states have call predecessors, (7127), 5030 states have return successors, (7413), 7052 states have call predecessors, (7413), 7125 states have call successors, (7413) [2022-12-14 14:00:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91001 states to 91001 states and 126529 transitions. [2022-12-14 14:00:39,227 INFO L78 Accepts]: Start accepts. Automaton has 91001 states and 126529 transitions. Word has length 149 [2022-12-14 14:00:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:39,227 INFO L495 AbstractCegarLoop]: Abstraction has 91001 states and 126529 transitions. [2022-12-14 14:00:39,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 91001 states and 126529 transitions. [2022-12-14 14:00:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 14:00:39,342 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:39,342 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, 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, 1, 1] [2022-12-14 14:00:39,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 14:00:39,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:00:39,543 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 568158538, now seen corresponding path program 2 times [2022-12-14 14:00:39,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368213215] [2022-12-14 14:00:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:39,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:00:39,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:39,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368213215] [2022-12-14 14:00:39,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368213215] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:39,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853544998] [2022-12-14 14:00:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:00:39,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:39,720 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:39,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 14:00:39,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:00:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:00:39,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:00:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:00:39,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853544998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:39,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:00:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557635685] [2022-12-14 14:00:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:00:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:00:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:00:39,848 INFO L87 Difference]: Start difference. First operand 91001 states and 126529 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:00:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:43,637 INFO L93 Difference]: Finished difference Result 121917 states and 170344 transitions. [2022-12-14 14:00:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:00:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2022-12-14 14:00:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:43,815 INFO L225 Difference]: With dead ends: 121917 [2022-12-14 14:00:43,815 INFO L226 Difference]: Without dead ends: 87425 [2022-12-14 14:00:43,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 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 14:00:43,870 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 40 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:43,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 322 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:00:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87425 states. [2022-12-14 14:00:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87425 to 82337. [2022-12-14 14:00:47,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82337 states, 71043 states have (on average 1.4334557943780528) internal successors, (101837), 71190 states have internal predecessors, (101837), 6839 states have call successors, (6839), 4455 states have call predecessors, (6839), 4454 states have return successors, (6837), 6692 states have call predecessors, (6837), 6837 states have call successors, (6837) [2022-12-14 14:00:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82337 states to 82337 states and 115513 transitions. [2022-12-14 14:00:47,985 INFO L78 Accepts]: Start accepts. Automaton has 82337 states and 115513 transitions. Word has length 150 [2022-12-14 14:00:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:00:47,986 INFO L495 AbstractCegarLoop]: Abstraction has 82337 states and 115513 transitions. [2022-12-14 14:00:47,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:00:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 82337 states and 115513 transitions. [2022-12-14 14:00:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 14:00:48,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:00:48,097 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, 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, 1, 1] [2022-12-14 14:00:48,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 14:00:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:48,298 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:00:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:00:48,299 INFO L85 PathProgramCache]: Analyzing trace with hash 2074662178, now seen corresponding path program 1 times [2022-12-14 14:00:48,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:00:48,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153807747] [2022-12-14 14:00:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:48,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:00:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:00:48,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:00:48,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153807747] [2022-12-14 14:00:48,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153807747] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:00:48,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493644017] [2022-12-14 14:00:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:00:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:00:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:00:48,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:00:48,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 14:00:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:00:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:00:48,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:00:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:00:48,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:00:48,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493644017] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:00:48,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:00:48,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 14:00:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542728105] [2022-12-14 14:00:48,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:00:48,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:00:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:00:48,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:00:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:00:48,629 INFO L87 Difference]: Start difference. First operand 82337 states and 115513 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:00:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:00:55,383 INFO L93 Difference]: Finished difference Result 202673 states and 283691 transitions. [2022-12-14 14:00:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:00:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2022-12-14 14:00:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:00:55,638 INFO L225 Difference]: With dead ends: 202673 [2022-12-14 14:00:55,638 INFO L226 Difference]: Without dead ends: 120393 [2022-12-14 14:00:55,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:00:55,718 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 465 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:00:55,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 434 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:00:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120393 states. [2022-12-14 14:01:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120393 to 120389. [2022-12-14 14:01:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120389 states, 103583 states have (on average 1.411862950484153) internal successors, (146245), 103802 states have internal predecessors, (146245), 10135 states have call successors, (10135), 6671 states have call predecessors, (10135), 6670 states have return successors, (10133), 9916 states have call predecessors, (10133), 10133 states have call successors, (10133) [2022-12-14 14:01:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120389 states to 120389 states and 166513 transitions. [2022-12-14 14:01:02,622 INFO L78 Accepts]: Start accepts. Automaton has 120389 states and 166513 transitions. Word has length 150 [2022-12-14 14:01:02,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:01:02,623 INFO L495 AbstractCegarLoop]: Abstraction has 120389 states and 166513 transitions. [2022-12-14 14:01:02,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:01:02,623 INFO L276 IsEmpty]: Start isEmpty. Operand 120389 states and 166513 transitions. [2022-12-14 14:01:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 14:01:02,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:01:02,772 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, 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, 1, 1] [2022-12-14 14:01:02,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 14:01:02,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:02,973 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:01:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:01:02,973 INFO L85 PathProgramCache]: Analyzing trace with hash 890886068, now seen corresponding path program 1 times [2022-12-14 14:01:02,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:01:02,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63549821] [2022-12-14 14:01:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:02,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:01:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:01:03,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:01:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63549821] [2022-12-14 14:01:03,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63549821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:01:03,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535674937] [2022-12-14 14:01:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:03,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:01:03,133 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:01:03,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:01:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:01:03,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:01:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 14:01:03,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:01:03,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535674937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:01:03,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:01:03,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-12-14 14:01:03,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168703427] [2022-12-14 14:01:03,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:01:03,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:01:03,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:01:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:01:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:01:03,304 INFO L87 Difference]: Start difference. First operand 120389 states and 166513 transitions. Second operand has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:01:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:01:13,489 INFO L93 Difference]: Finished difference Result 288185 states and 397685 transitions. [2022-12-14 14:01:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:01:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 152 [2022-12-14 14:01:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:01:13,885 INFO L225 Difference]: With dead ends: 288185 [2022-12-14 14:01:13,885 INFO L226 Difference]: Without dead ends: 167853 [2022-12-14 14:01:14,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:01:14,016 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 436 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:01:14,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 429 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:01:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167853 states. [2022-12-14 14:01:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167853 to 167849. [2022-12-14 14:01:24,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167849 states, 143709 states have (on average 1.394060218914612) internal successors, (200339), 144036 states have internal predecessors, (200339), 14585 states have call successors, (14585), 9555 states have call predecessors, (14585), 9554 states have return successors, (14583), 14258 states have call predecessors, (14583), 14583 states have call successors, (14583) [2022-12-14 14:01:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167849 states to 167849 states and 229507 transitions. [2022-12-14 14:01:24,647 INFO L78 Accepts]: Start accepts. Automaton has 167849 states and 229507 transitions. Word has length 152 [2022-12-14 14:01:24,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:01:24,648 INFO L495 AbstractCegarLoop]: Abstraction has 167849 states and 229507 transitions. [2022-12-14 14:01:24,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:01:24,648 INFO L276 IsEmpty]: Start isEmpty. Operand 167849 states and 229507 transitions. [2022-12-14 14:01:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 14:01:24,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:01:24,862 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, 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, 1, 1] [2022-12-14 14:01:24,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 14:01:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:25,064 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:01:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:01:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1560447112, now seen corresponding path program 1 times [2022-12-14 14:01:25,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:01:25,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415165260] [2022-12-14 14:01:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:25,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:01:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:01:25,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:01:25,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415165260] [2022-12-14 14:01:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415165260] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:01:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720763385] [2022-12-14 14:01:25,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:25,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:25,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:01:25,221 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:01:25,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:01:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:01:25,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:01:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:01:25,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:01:25,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720763385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:01:25,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:01:25,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-12-14 14:01:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275752219] [2022-12-14 14:01:25,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:01:25,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:01:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:01:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:01:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:01:25,427 INFO L87 Difference]: Start difference. First operand 167849 states and 229507 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:01:41,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:01:41,151 INFO L93 Difference]: Finished difference Result 413312 states and 563690 transitions. [2022-12-14 14:01:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:01:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 154 [2022-12-14 14:01:41,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:01:41,769 INFO L225 Difference]: With dead ends: 413312 [2022-12-14 14:01:41,769 INFO L226 Difference]: Without dead ends: 245520 [2022-12-14 14:01:41,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:01:41,969 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 462 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:01:41,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 427 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:01:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245520 states. [2022-12-14 14:01:58,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245520 to 245516. [2022-12-14 14:01:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245516 states, 209624 states have (on average 1.3719898484906308) internal successors, (287602), 210113 states have internal predecessors, (287602), 21595 states have call successors, (21595), 14297 states have call predecessors, (21595), 14296 states have return successors, (21593), 21106 states have call predecessors, (21593), 21593 states have call successors, (21593) [2022-12-14 14:01:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245516 states to 245516 states and 330790 transitions. [2022-12-14 14:01:59,282 INFO L78 Accepts]: Start accepts. Automaton has 245516 states and 330790 transitions. Word has length 154 [2022-12-14 14:01:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:01:59,282 INFO L495 AbstractCegarLoop]: Abstraction has 245516 states and 330790 transitions. [2022-12-14 14:01:59,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:01:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 245516 states and 330790 transitions. [2022-12-14 14:01:59,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:01:59,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:01:59,588 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, 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, 1, 1] [2022-12-14 14:01:59,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 14:01:59,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:59,788 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:01:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:01:59,789 INFO L85 PathProgramCache]: Analyzing trace with hash 451681350, now seen corresponding path program 1 times [2022-12-14 14:01:59,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:01:59,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105701159] [2022-12-14 14:01:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:01:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:01:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 49 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 14:01:59,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:01:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105701159] [2022-12-14 14:01:59,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105701159] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:01:59,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220687901] [2022-12-14 14:01:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:01:59,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:01:59,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:01:59,932 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:01:59,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:02:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:02:00,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:02:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:02:00,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:02:00,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220687901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:02:00,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:02:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:02:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908234772] [2022-12-14 14:02:00,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:02:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:02:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:02:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:02:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:02:00,094 INFO L87 Difference]: Start difference. First operand 245516 states and 330790 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:02:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:02:19,862 INFO L93 Difference]: Finished difference Result 461520 states and 624964 transitions. [2022-12-14 14:02:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:02:19,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 14:02:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:02:20,716 INFO L225 Difference]: With dead ends: 461520 [2022-12-14 14:02:20,716 INFO L226 Difference]: Without dead ends: 288260 [2022-12-14 14:02:20,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:02:20,954 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 123 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:02:20,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 221 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:02:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288260 states. [2022-12-14 14:02:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288260 to 285928. [2022-12-14 14:02:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285928 states, 247733 states have (on average 1.3494245821105788) internal successors, (334297), 248222 states have internal predecessors, (334297), 22017 states have call successors, (22017), 16178 states have call predecessors, (22017), 16177 states have return successors, (23603), 21528 states have call predecessors, (23603), 22015 states have call successors, (23603) [2022-12-14 14:02:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285928 states to 285928 states and 379917 transitions. [2022-12-14 14:02:41,379 INFO L78 Accepts]: Start accepts. Automaton has 285928 states and 379917 transitions. Word has length 156 [2022-12-14 14:02:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:02:41,380 INFO L495 AbstractCegarLoop]: Abstraction has 285928 states and 379917 transitions. [2022-12-14 14:02:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:02:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 285928 states and 379917 transitions. [2022-12-14 14:02:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 14:02:41,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:02:41,875 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, 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, 1] [2022-12-14 14:02:41,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 14:02:42,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:42,076 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:02:42,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:02:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash -291910318, now seen corresponding path program 1 times [2022-12-14 14:02:42,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:02:42,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624048102] [2022-12-14 14:02:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:02:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:02:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 56 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:02:42,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:02:42,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624048102] [2022-12-14 14:02:42,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624048102] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:02:42,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479710228] [2022-12-14 14:02:42,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:02:42,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:02:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:02:42,253 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:02:42,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:02:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:02:42,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:02:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:02:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:02:42,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:02:42,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479710228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:02:42,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:02:42,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 14:02:42,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312265034] [2022-12-14 14:02:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:02:42,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:02:42,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:02:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:02:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:02:42,429 INFO L87 Difference]: Start difference. First operand 285928 states and 379917 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:03:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:03:07,310 INFO L93 Difference]: Finished difference Result 568502 states and 758383 transitions. [2022-12-14 14:03:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:03:07,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 158 [2022-12-14 14:03:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:03:08,380 INFO L225 Difference]: With dead ends: 568502 [2022-12-14 14:03:08,380 INFO L226 Difference]: Without dead ends: 368284 [2022-12-14 14:03:08,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:03:08,630 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 307 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:03:08,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 598 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:03:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368284 states. [2022-12-14 14:03:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368284 to 348614. [2022-12-14 14:03:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348614 states, 301021 states have (on average 1.3385145886831815) internal successors, (402921), 301186 states have internal predecessors, (402921), 27915 states have call successors, (27915), 20294 states have call predecessors, (27915), 19677 states have return successors, (30311), 27134 states have call predecessors, (30311), 27913 states have call successors, (30311) [2022-12-14 14:03:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348614 states to 348614 states and 461147 transitions. [2022-12-14 14:03:35,071 INFO L78 Accepts]: Start accepts. Automaton has 348614 states and 461147 transitions. Word has length 158 [2022-12-14 14:03:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:03:35,072 INFO L495 AbstractCegarLoop]: Abstraction has 348614 states and 461147 transitions. [2022-12-14 14:03:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:03:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 348614 states and 461147 transitions. [2022-12-14 14:03:35,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 14:03:35,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:03:35,610 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, 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, 1] [2022-12-14 14:03:35,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 14:03:35,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 14:03:35,811 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:03:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:03:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1692445465, now seen corresponding path program 1 times [2022-12-14 14:03:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:03:35,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986918701] [2022-12-14 14:03:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:35,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:03:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 14:03:35,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:03:35,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986918701] [2022-12-14 14:03:35,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986918701] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:03:35,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625906892] [2022-12-14 14:03:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:03:35,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:03:35,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:03:35,909 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:03:35,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 14:03:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:03:36,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:03:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:03:36,025 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:03:36,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:03:36,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625906892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:03:36,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:03:36,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:03:36,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630413853] [2022-12-14 14:03:36,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:03:36,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:03:36,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:03:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:03:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:03:36,026 INFO L87 Difference]: Start difference. First operand 348614 states and 461147 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:04:06,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:04:06,110 INFO L93 Difference]: Finished difference Result 666516 states and 891623 transitions. [2022-12-14 14:04:06,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:04:06,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 154 [2022-12-14 14:04:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:04:07,606 INFO L225 Difference]: With dead ends: 666516 [2022-12-14 14:04:07,606 INFO L226 Difference]: Without dead ends: 432444 [2022-12-14 14:04:08,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:04:08,023 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 101 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:04:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 404 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:04:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432444 states. [2022-12-14 14:04:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432444 to 386414. [2022-12-14 14:04:36,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386414 states, 335365 states have (on average 1.3505434377469325) internal successors, (452925), 335530 states have internal predecessors, (452925), 29643 states have call successors, (29643), 22022 states have call predecessors, (29643), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 14:04:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386414 states to 386414 states and 514607 transitions. [2022-12-14 14:04:37,635 INFO L78 Accepts]: Start accepts. Automaton has 386414 states and 514607 transitions. Word has length 154 [2022-12-14 14:04:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:04:37,636 INFO L495 AbstractCegarLoop]: Abstraction has 386414 states and 514607 transitions. [2022-12-14 14:04:37,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:04:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 386414 states and 514607 transitions. [2022-12-14 14:04:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:04:38,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:04:38,225 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, 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 14:04:38,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-14 14:04:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 14:04:38,426 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:04:38,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:04:38,428 INFO L85 PathProgramCache]: Analyzing trace with hash 145056395, now seen corresponding path program 1 times [2022-12-14 14:04:38,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:04:38,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794733867] [2022-12-14 14:04:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:04:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:04:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:04:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 42 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 14:04:38,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:04:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794733867] [2022-12-14 14:04:38,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794733867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:04:38,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020406219] [2022-12-14 14:04:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:04:38,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:04:38,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:04:38,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:04:38,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 14:04:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:04:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:04:38,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:04:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:04:38,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:04:38,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020406219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:04:38,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:04:38,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 14:04:38,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593411649] [2022-12-14 14:04:38,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:04:38,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:04:38,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:04:38,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:04:38,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:04:38,618 INFO L87 Difference]: Start difference. First operand 386414 states and 514607 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:05:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:05:07,682 INFO L93 Difference]: Finished difference Result 659100 states and 891967 transitions. [2022-12-14 14:05:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:05:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-12-14 14:05:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:05:08,742 INFO L225 Difference]: With dead ends: 659100 [2022-12-14 14:05:08,742 INFO L226 Difference]: Without dead ends: 387066 [2022-12-14 14:05:09,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 157 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 14:05:09,268 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 141 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:05:09,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 408 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:05:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387066 states. [2022-12-14 14:05:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387066 to 384254. [2022-12-14 14:05:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384254 states, 333205 states have (on average 1.3320718476613496) internal successors, (443853), 333370 states have internal predecessors, (443853), 29643 states have call successors, (29643), 22022 states have call predecessors, (29643), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 14:05:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384254 states to 384254 states and 505535 transitions. [2022-12-14 14:05:38,214 INFO L78 Accepts]: Start accepts. Automaton has 384254 states and 505535 transitions. Word has length 156 [2022-12-14 14:05:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:05:38,215 INFO L495 AbstractCegarLoop]: Abstraction has 384254 states and 505535 transitions. [2022-12-14 14:05:38,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:05:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 384254 states and 505535 transitions. [2022-12-14 14:05:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:05:38,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:05:38,580 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, 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, 1, 1] [2022-12-14 14:05:38,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 14:05:38,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 14:05:38,781 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:05:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:05:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash -215460663, now seen corresponding path program 1 times [2022-12-14 14:05:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:05:38,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014348481] [2022-12-14 14:05:38,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:05:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 53 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:05:38,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:05:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014348481] [2022-12-14 14:05:38,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014348481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:05:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971314339] [2022-12-14 14:05:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:05:38,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:05:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:05:38,896 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:05:38,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 14:05:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:05:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:05:39,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:05:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:05:39,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:05:39,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971314339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:05:39,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:05:39,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:05:39,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321380686] [2022-12-14 14:05:39,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:05:39,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:05:39,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:05:39,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:05:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:05:39,082 INFO L87 Difference]: Start difference. First operand 384254 states and 505535 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:06:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:06:10,760 INFO L93 Difference]: Finished difference Result 702094 states and 930158 transitions. [2022-12-14 14:06:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:06:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 14:06:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:06:12,085 INFO L225 Difference]: With dead ends: 702094 [2022-12-14 14:06:12,085 INFO L226 Difference]: Without dead ends: 433300 [2022-12-14 14:06:12,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:06:12,449 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 128 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:06:12,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 221 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:06:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433300 states. [2022-12-14 14:06:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433300 to 426800. [2022-12-14 14:06:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426800 states, 372937 states have (on average 1.3165306740816813) internal successors, (490983), 373588 states have internal predecessors, (490983), 30147 states have call successors, (30147), 23822 states have call predecessors, (30147), 23715 states have return successors, (34423), 29390 states have call predecessors, (34423), 30145 states have call successors, (34423) [2022-12-14 14:06:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426800 states to 426800 states and 555553 transitions. [2022-12-14 14:06:45,715 INFO L78 Accepts]: Start accepts. Automaton has 426800 states and 555553 transitions. Word has length 156 [2022-12-14 14:06:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:06:45,715 INFO L495 AbstractCegarLoop]: Abstraction has 426800 states and 555553 transitions. [2022-12-14 14:06:45,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:06:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 426800 states and 555553 transitions. [2022-12-14 14:06:46,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 14:06:46,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:06:46,361 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:46,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 14:06:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 14:06:46,562 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:06:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:06:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 465506772, now seen corresponding path program 1 times [2022-12-14 14:06:46,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:06:46,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23348232] [2022-12-14 14:06:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:06:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 39 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 14:06:46,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:06:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23348232] [2022-12-14 14:06:46,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23348232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:06:46,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436946141] [2022-12-14 14:06:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:06:46,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:06:46,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:06:46,731 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:06:46,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09fc23b6-7588-46bf-bb87-51830d79335c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 14:06:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:06:46,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 14:06:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:06:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 80 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:06:46,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:06:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 14:06:48,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436946141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:06:48,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1964760056] [2022-12-14 14:06:48,472 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 14:06:48,473 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:06:48,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:06:48,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:06:48,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:08:46,752 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 53 for LOIs [2022-12-14 14:08:46,755 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 178 for LOIs [2022-12-14 14:10:41,716 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 1029 DAG size of output: 1027 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)