./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/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 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a --- 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 03:15:32,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:15:32,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:15:32,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:15:32,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:15:32,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:15:32,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:15:32,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:15:32,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:15:32,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:15:32,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:15:32,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:15:32,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:15:32,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:15:32,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:15:32,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:15:32,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:15:32,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:15:32,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:15:32,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:15:32,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:15:32,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:15:32,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:15:32,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:15:32,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:15:32,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:15:32,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:15:32,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:15:32,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:15:32,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:15:32,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:15:32,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:15:32,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:15:32,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:15:32,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:15:32,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:15:32,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:15:32,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:15:32,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:15:32,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:15:32,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:15:32,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:15:32,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:15:32,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:15:32,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:15:32,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:15:32,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:15:32,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:15:32,487 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:15:32,487 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:15:32,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:15:32,487 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:15:32,487 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:15:32,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:15:32,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:15:32,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:15:32,488 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:15:32,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:15:32,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:15:32,489 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:15:32,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:15:32,489 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:15:32,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:15:32,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:15:32,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:15:32,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:15:32,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:15:32,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:15:32,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:32,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:15:32,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:15:32,492 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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2dec1b2e3c1461164aa09bac8cca047a14ba0fda75d53737804411255b62653a [2022-12-14 03:15:32,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:15:32,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:15:32,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:15:32,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:15:32,695 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:15:32,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-12-14 03:15:35,289 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:15:35,440 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:15:35,440 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c [2022-12-14 03:15:35,444 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/data/8c1c94525/5e176efaff9a4b3eba118eb0ee9eaf6b/FLAG7d0b5342e [2022-12-14 03:15:35,454 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/data/8c1c94525/5e176efaff9a4b3eba118eb0ee9eaf6b [2022-12-14 03:15:35,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:15:35,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:15:35,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:35,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:15:35,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:15:35,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49f2efd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35, skipping insertion in model container [2022-12-14 03:15:35,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:15:35,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:15:35,581 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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2022-12-14 03:15:35,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:35,601 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:15:35,610 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_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound20.c[535,548] [2022-12-14 03:15:35,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:35,625 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:15:35,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35 WrapperNode [2022-12-14 03:15:35,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:35,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:35,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:15:35,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:15:35,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,650 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-12-14 03:15:35,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:35,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:15:35,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:15:35,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:15:35,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:15:35,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:15:35,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:15:35,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:15:35,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (1/1) ... [2022-12-14 03:15:35,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:35,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:35,691 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:15:35,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:15:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:15:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 03:15:35,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 03:15:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:15:35,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:15:35,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:15:35,719 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 03:15:35,719 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 03:15:35,776 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:15:35,778 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:15:35,898 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:15:35,916 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:15:35,916 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 03:15:35,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:35 BoogieIcfgContainer [2022-12-14 03:15:35,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:15:35,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:15:35,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:15:35,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:15:35,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:15:35" (1/3) ... [2022-12-14 03:15:35,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0f35fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:35, skipping insertion in model container [2022-12-14 03:15:35,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:35" (2/3) ... [2022-12-14 03:15:35,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a0f35fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:35, skipping insertion in model container [2022-12-14 03:15:35,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:35" (3/3) ... [2022-12-14 03:15:35,925 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound20.c [2022-12-14 03:15:35,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:15:35,941 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:15:35,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:15:35,982 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;@3c27bec5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:15:35,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:15:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 03:15:35,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 03:15:35,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:35,992 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:35,993 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash -732132214, now seen corresponding path program 1 times [2022-12-14 03:15:36,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:36,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579352202] [2022-12-14 03:15:36,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:36,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:36,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003916248] [2022-12-14 03:15:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:36,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:36,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:36,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:36,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:15:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 03:15:36,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:36,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:36,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579352202] [2022-12-14 03:15:36,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:36,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003916248] [2022-12-14 03:15:36,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003916248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:36,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:36,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:15:36,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128475566] [2022-12-14 03:15:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:36,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 03:15:36,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 03:15:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 03:15:36,222 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:36,245 INFO L93 Difference]: Finished difference Result 48 states and 77 transitions. [2022-12-14 03:15:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 03:15:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2022-12-14 03:15:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:36,253 INFO L225 Difference]: With dead ends: 48 [2022-12-14 03:15:36,253 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 03:15:36,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 03:15:36,257 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:36,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 03:15:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 03:15:36,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:15:36,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-12-14 03:15:36,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2022-12-14 03:15:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:36,285 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-12-14 03:15:36,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:36,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-12-14 03:15:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 03:15:36,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:36,286 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:36,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:36,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 03:15:36,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:36,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:36,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1566218095, now seen corresponding path program 1 times [2022-12-14 03:15:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:36,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012563732] [2022-12-14 03:15:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:36,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:36,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:36,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86410599] [2022-12-14 03:15:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:36,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:36,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:36,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:36,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:15:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:15:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:36,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:36,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012563732] [2022-12-14 03:15:36,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:36,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86410599] [2022-12-14 03:15:36,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86410599] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:36,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:36,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:15:36,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540568949] [2022-12-14 03:15:36,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:36,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:36,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:36,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:36,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:15:36,763 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:36,783 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2022-12-14 03:15:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-12-14 03:15:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:36,784 INFO L225 Difference]: With dead ends: 34 [2022-12-14 03:15:36,784 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 03:15:36,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 03:15:36,785 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:36,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 03:15:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 03:15:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 03:15:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-12-14 03:15:36,790 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2022-12-14 03:15:36,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:36,790 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-12-14 03:15:36,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:36,791 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-12-14 03:15:36,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 03:15:36,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:36,791 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:36,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:15:36,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:36,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:36,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1567886391, now seen corresponding path program 1 times [2022-12-14 03:15:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869630919] [2022-12-14 03:15:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:36,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:37,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:37,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227907649] [2022-12-14 03:15:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:37,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:37,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:37,032 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:37,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:15:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 03:15:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:37,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:37,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869630919] [2022-12-14 03:15:37,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:37,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227907649] [2022-12-14 03:15:37,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227907649] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:37,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:37,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:15:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390648092] [2022-12-14 03:15:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:37,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:37,213 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:41,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:15:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:42,605 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2022-12-14 03:15:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-12-14 03:15:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:42,606 INFO L225 Difference]: With dead ends: 46 [2022-12-14 03:15:42,606 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 03:15:42,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:15:42,608 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:42,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-12-14 03:15:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 03:15:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-12-14 03:15:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 03:15:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2022-12-14 03:15:42,617 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 14 [2022-12-14 03:15:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:42,617 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2022-12-14 03:15:42,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 03:15:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2022-12-14 03:15:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 03:15:42,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:42,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:42,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:15:42,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:42,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1259885980, now seen corresponding path program 1 times [2022-12-14 03:15:42,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:42,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016051154] [2022-12-14 03:15:42,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:42,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117695594] [2022-12-14 03:15:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:42,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:42,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:42,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:42,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:15:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:42,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:15:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:42,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:43,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016051154] [2022-12-14 03:15:43,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:43,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117695594] [2022-12-14 03:15:43,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117695594] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:43,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418496999] [2022-12-14 03:15:43,113 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:15:43,113 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:43,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:43,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:43,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:43,421 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-12-14 03:15:43,430 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:15:43,466 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:47,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [418496999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:47,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:15:47,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 7] total 22 [2022-12-14 03:15:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873363878] [2022-12-14 03:15:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:15:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:15:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-14 03:15:47,874 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 03:15:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:48,083 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-12-14 03:15:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 03:15:48,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2022-12-14 03:15:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:48,084 INFO L225 Difference]: With dead ends: 57 [2022-12-14 03:15:48,084 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 03:15:48,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-12-14 03:15:48,085 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:48,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 107 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 03:15:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-12-14 03:15:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 03:15:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2022-12-14 03:15:48,096 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 20 [2022-12-14 03:15:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:48,096 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2022-12-14 03:15:48,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 03:15:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2022-12-14 03:15:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 03:15:48,097 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:48,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:48,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:15:48,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 03:15:48,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1960315687, now seen corresponding path program 1 times [2022-12-14 03:15:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:48,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492039652] [2022-12-14 03:15:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:48,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:48,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267839453] [2022-12-14 03:15:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:48,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:48,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:48,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:15:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 03:15:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:15:48,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:48,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492039652] [2022-12-14 03:15:48,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267839453] [2022-12-14 03:15:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267839453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:48,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:48,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:15:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878816348] [2022-12-14 03:15:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:48,410 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 03:15:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:48,441 INFO L93 Difference]: Finished difference Result 86 states and 120 transitions. [2022-12-14 03:15:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-14 03:15:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:48,441 INFO L225 Difference]: With dead ends: 86 [2022-12-14 03:15:48,442 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 03:15:48,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:15:48,442 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:48,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 03:15:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 03:15:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 37 states have internal predecessors, (49), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 03:15:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-12-14 03:15:48,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 26 [2022-12-14 03:15:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:48,452 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-12-14 03:15:48,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 03:15:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-12-14 03:15:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 03:15:48,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:48,453 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:48,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:15:48,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:48,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:15:48,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:48,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1819629797, now seen corresponding path program 1 times [2022-12-14 03:15:48,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:48,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061397265] [2022-12-14 03:15:48,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:48,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:48,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:15:48,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444947346] [2022-12-14 03:15:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:48,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:48,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:48,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:15:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 03:15:48,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 03:15:48,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 03:15:49,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061397265] [2022-12-14 03:15:49,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:15:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444947346] [2022-12-14 03:15:49,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444947346] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:49,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316376749] [2022-12-14 03:15:49,002 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 03:15:49,002 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:49,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:49,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:49,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:49,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-12-14 03:15:50,063 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:15:50,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:03,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1226#(and (<= 2 ~counter~0) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 03:16:03,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:03,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:16:03,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2022-12-14 03:16:03,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985781880] [2022-12-14 03:16:03,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:03,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 03:16:03,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:03,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 03:16:03,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=657, Unknown=1, NotChecked=0, Total=756 [2022-12-14 03:16:03,606 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 03:16:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:03,845 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-12-14 03:16:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:16:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-12-14 03:16:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:03,846 INFO L225 Difference]: With dead ends: 71 [2022-12-14 03:16:03,846 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 03:16:03,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=115, Invalid=754, Unknown=1, NotChecked=0, Total=870 [2022-12-14 03:16:03,847 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:03,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 136 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:16:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 03:16:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 37. [2022-12-14 03:16:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 03:16:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-12-14 03:16:03,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 30 [2022-12-14 03:16:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:03,857 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-12-14 03:16:03,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 03:16:03,857 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-12-14 03:16:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 03:16:03,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:03,858 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:03,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 03:16:04,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:04,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:04,061 INFO L85 PathProgramCache]: Analyzing trace with hash 149144288, now seen corresponding path program 1 times [2022-12-14 03:16:04,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506410796] [2022-12-14 03:16:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:04,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:04,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:04,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374066589] [2022-12-14 03:16:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:04,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:04,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:04,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:04,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:16:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:04,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 03:16:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:16:04,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:16:04,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506410796] [2022-12-14 03:16:04,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374066589] [2022-12-14 03:16:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374066589] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:04,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:16:04,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2022-12-14 03:16:04,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764647459] [2022-12-14 03:16:04,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:04,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 03:16:04,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:04,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 03:16:04,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:16:04,177 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 03:16:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:04,210 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-12-14 03:16:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:16:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-12-14 03:16:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:04,211 INFO L225 Difference]: With dead ends: 67 [2022-12-14 03:16:04,217 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 03:16:04,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:16:04,217 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 12 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:04,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 125 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:16:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 03:16:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-12-14 03:16:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 03:16:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-12-14 03:16:04,228 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 32 [2022-12-14 03:16:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:04,228 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-12-14 03:16:04,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 03:16:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-12-14 03:16:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:16:04,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:04,229 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 03:16:04,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:16:04,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:04,431 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:04,432 INFO L85 PathProgramCache]: Analyzing trace with hash 724021605, now seen corresponding path program 1 times [2022-12-14 03:16:04,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:04,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932795581] [2022-12-14 03:16:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:04,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:04,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:04,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128667782] [2022-12-14 03:16:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:04,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:04,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:04,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:16:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 03:16:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:16:04,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 03:16:04,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:04,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932795581] [2022-12-14 03:16:04,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128667782] [2022-12-14 03:16:04,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128667782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:04,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33023723] [2022-12-14 03:16:04,591 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 03:16:04,591 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:04,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:04,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:04,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:06,157 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 03:16:06,162 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:16:06,194 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:13,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:13,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:13,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:16:13,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-12-14 03:16:13,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355454037] [2022-12-14 03:16:13,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 03:16:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 03:16:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-12-14 03:16:13,834 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 03:16:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:13,940 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2022-12-14 03:16:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 03:16:13,941 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 34 [2022-12-14 03:16:13,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:13,941 INFO L225 Difference]: With dead ends: 122 [2022-12-14 03:16:13,941 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 03:16:13,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:16:13,942 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 55 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:13,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 207 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:16:13,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 03:16:13,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2022-12-14 03:16:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.28125) internal successors, (82), 65 states have internal predecessors, (82), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 03:16:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-12-14 03:16:13,962 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 34 [2022-12-14 03:16:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:13,962 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-12-14 03:16:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 03:16:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-12-14 03:16:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 03:16:13,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:13,963 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:13,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:16:14,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:14,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:14,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1908181273, now seen corresponding path program 1 times [2022-12-14 03:16:14,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207178386] [2022-12-14 03:16:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:14,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:14,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707447002] [2022-12-14 03:16:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:14,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:14,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:14,181 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:14,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:16:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:16:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 03:16:14,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:16:14,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207178386] [2022-12-14 03:16:14,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:14,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707447002] [2022-12-14 03:16:14,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707447002] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:14,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:16:14,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:16:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279873029] [2022-12-14 03:16:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:14,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:16:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:16:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:16:14,238 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 03:16:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:14,287 INFO L93 Difference]: Finished difference Result 151 states and 201 transitions. [2022-12-14 03:16:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:16:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-12-14 03:16:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:14,289 INFO L225 Difference]: With dead ends: 151 [2022-12-14 03:16:14,289 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 03:16:14,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 03:16:14,290 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:14,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:16:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 03:16:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2022-12-14 03:16:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 82 states have internal predecessors, (104), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 03:16:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 145 transitions. [2022-12-14 03:16:14,314 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 145 transitions. Word has length 38 [2022-12-14 03:16:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:14,314 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 145 transitions. [2022-12-14 03:16:14,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 03:16:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 145 transitions. [2022-12-14 03:16:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 03:16:14,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:14,315 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2022-12-14 03:16:14,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 03:16:14,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:14,517 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1881389676, now seen corresponding path program 1 times [2022-12-14 03:16:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581826875] [2022-12-14 03:16:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:14,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:14,539 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066858767] [2022-12-14 03:16:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:14,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:14,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:14,543 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:14,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:16:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:14,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 03:16:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:16:14,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 03:16:14,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581826875] [2022-12-14 03:16:14,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066858767] [2022-12-14 03:16:14,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066858767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:14,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570211125] [2022-12-14 03:16:14,688 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:16:14,688 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:14,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:14,689 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:14,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:16,289 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 55 for LOIs [2022-12-14 03:16:16,308 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:16:16,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:34,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3031#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:34,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:34,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:16:34,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-12-14 03:16:34,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141657087] [2022-12-14 03:16:34,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:34,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 03:16:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:34,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 03:16:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-12-14 03:16:34,593 INFO L87 Difference]: Start difference. First operand 110 states and 145 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 03:16:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:34,776 INFO L93 Difference]: Finished difference Result 230 states and 311 transitions. [2022-12-14 03:16:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:16:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 40 [2022-12-14 03:16:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:34,777 INFO L225 Difference]: With dead ends: 230 [2022-12-14 03:16:34,777 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 03:16:34,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:16:34,778 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:34,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 278 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:16:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 03:16:34,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 156. [2022-12-14 03:16:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 117 states have internal predecessors, (149), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-14 03:16:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 208 transitions. [2022-12-14 03:16:34,810 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 208 transitions. Word has length 40 [2022-12-14 03:16:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:34,810 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 208 transitions. [2022-12-14 03:16:34,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 03:16:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 208 transitions. [2022-12-14 03:16:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 03:16:34,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:34,811 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 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] [2022-12-14 03:16:34,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 03:16:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:35,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1532401011, now seen corresponding path program 1 times [2022-12-14 03:16:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:35,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290361658] [2022-12-14 03:16:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:35,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:35,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:35,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600700077] [2022-12-14 03:16:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:35,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:35,036 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:35,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 03:16:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:35,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 03:16:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:16:35,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 03:16:35,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290361658] [2022-12-14 03:16:35,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600700077] [2022-12-14 03:16:35,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600700077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:35,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2146744692] [2022-12-14 03:16:35,210 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:16:35,210 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:35,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:35,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:35,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:37,303 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 03:16:37,307 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:16:37,326 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:52,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3905#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:52,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:52,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:16:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-14 03:16:52,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186998090] [2022-12-14 03:16:52,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:52,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:16:52,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:16:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 03:16:52,566 INFO L87 Difference]: Start difference. First operand 156 states and 208 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 03:16:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:52,778 INFO L93 Difference]: Finished difference Result 252 states and 333 transitions. [2022-12-14 03:16:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 03:16:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 46 [2022-12-14 03:16:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:52,781 INFO L225 Difference]: With dead ends: 252 [2022-12-14 03:16:52,781 INFO L226 Difference]: Without dead ends: 247 [2022-12-14 03:16:52,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 03:16:52,782 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 171 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:52,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 234 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:16:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-14 03:16:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 212. [2022-12-14 03:16:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 157 states have (on average 1.286624203821656) internal successors, (202), 162 states have internal predecessors, (202), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (42), 37 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 03:16:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 287 transitions. [2022-12-14 03:16:52,830 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 287 transitions. Word has length 46 [2022-12-14 03:16:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:52,830 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 287 transitions. [2022-12-14 03:16:52,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 11 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 03:16:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 287 transitions. [2022-12-14 03:16:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 03:16:52,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:52,831 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2022-12-14 03:16:52,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 03:16:53,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:53,033 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:16:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash -482951008, now seen corresponding path program 1 times [2022-12-14 03:16:53,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758212571] [2022-12-14 03:16:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:53,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:53,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:16:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207733543] [2022-12-14 03:16:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:53,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:53,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:53,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:53,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 03:16:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:16:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 03:16:53,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 03:16:53,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:53,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758212571] [2022-12-14 03:16:53,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:16:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207733543] [2022-12-14 03:16:53,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207733543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001842456] [2022-12-14 03:16:53,484 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:16:53,484 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:53,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:53,484 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:53,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:55,972 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 03:16:55,976 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:16:56,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:17:14,681 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 113 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:17:23,305 WARN L233 SmtUtils]: Spent 7.78s on a formula simplification. DAG size of input: 116 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:17:29,829 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 113 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:17:33,557 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4933#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:17:33,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:17:33,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:17:33,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-12-14 03:17:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246522245] [2022-12-14 03:17:33,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:17:33,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:17:33,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:17:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=930, Unknown=1, NotChecked=0, Total=1056 [2022-12-14 03:17:33,559 INFO L87 Difference]: Start difference. First operand 212 states and 287 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:17:35,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:17:37,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:17:39,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:17:42,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:17:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:42,226 INFO L93 Difference]: Finished difference Result 308 states and 423 transitions. [2022-12-14 03:17:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:17:42,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2022-12-14 03:17:42,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:42,228 INFO L225 Difference]: With dead ends: 308 [2022-12-14 03:17:42,228 INFO L226 Difference]: Without dead ends: 218 [2022-12-14 03:17:42,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=141, Invalid=1048, Unknown=1, NotChecked=0, Total=1190 [2022-12-14 03:17:42,229 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 53 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:42,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 185 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 4 Unknown, 0 Unchecked, 8.5s Time] [2022-12-14 03:17:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-14 03:17:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 200. [2022-12-14 03:17:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 148 states have (on average 1.2297297297297298) internal successors, (182), 151 states have internal predecessors, (182), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-14 03:17:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 261 transitions. [2022-12-14 03:17:42,275 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 261 transitions. Word has length 52 [2022-12-14 03:17:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:42,275 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 261 transitions. [2022-12-14 03:17:42,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:17:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 261 transitions. [2022-12-14 03:17:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 03:17:42,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:42,277 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:42,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 03:17:42,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:42,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:17:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 80082561, now seen corresponding path program 1 times [2022-12-14 03:17:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:42,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364490044] [2022-12-14 03:17:42,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:42,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:17:42,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050376807] [2022-12-14 03:17:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:42,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:42,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:42,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:42,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 03:17:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:42,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:17:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 64 proven. 12 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-12-14 03:17:42,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:17:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-12-14 03:17:42,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364490044] [2022-12-14 03:17:42,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:17:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050376807] [2022-12-14 03:17:42,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050376807] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:17:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1802842684] [2022-12-14 03:17:42,652 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:17:42,652 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:17:42,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:17:42,652 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:17:42,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:17:44,747 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2022-12-14 03:17:44,783 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:17:44,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:17:46,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6191#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:17:46,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:17:46,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:17:46,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-12-14 03:17:46,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138294866] [2022-12-14 03:17:46,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:17:46,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:17:46,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:46,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:17:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:17:46,675 INFO L87 Difference]: Start difference. First operand 200 states and 261 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:17:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:46,801 INFO L93 Difference]: Finished difference Result 492 states and 676 transitions. [2022-12-14 03:17:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:17:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 82 [2022-12-14 03:17:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:46,804 INFO L225 Difference]: With dead ends: 492 [2022-12-14 03:17:46,804 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 03:17:46,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-12-14 03:17:46,805 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:46,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:17:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 03:17:46,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2022-12-14 03:17:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 259 states have (on average 1.2664092664092663) internal successors, (328), 265 states have internal predecessors, (328), 74 states have call successors, (74), 12 states have call predecessors, (74), 11 states have return successors, (73), 67 states have call predecessors, (73), 73 states have call successors, (73) [2022-12-14 03:17:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 475 transitions. [2022-12-14 03:17:46,880 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 475 transitions. Word has length 82 [2022-12-14 03:17:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:46,880 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 475 transitions. [2022-12-14 03:17:46,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 03:17:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 475 transitions. [2022-12-14 03:17:46,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 03:17:46,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:46,881 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:46,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 03:17:47,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 03:17:47,082 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:17:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash -595391949, now seen corresponding path program 2 times [2022-12-14 03:17:47,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:47,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244274636] [2022-12-14 03:17:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:47,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:17:47,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242976527] [2022-12-14 03:17:47,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:17:47,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:47,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:47,089 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:47,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 03:17:47,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:17:47,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:17:47,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:17:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-12-14 03:17:47,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:17:47,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244274636] [2022-12-14 03:17:47,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:17:47,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242976527] [2022-12-14 03:17:47,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242976527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:17:47,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:17:47,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 03:17:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166987568] [2022-12-14 03:17:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:17:47,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:17:47,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:17:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:17:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:17:47,169 INFO L87 Difference]: Start difference. First operand 345 states and 475 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 03:17:47,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:47,304 INFO L93 Difference]: Finished difference Result 591 states and 827 transitions. [2022-12-14 03:17:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:17:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-12-14 03:17:47,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:47,307 INFO L225 Difference]: With dead ends: 591 [2022-12-14 03:17:47,307 INFO L226 Difference]: Without dead ends: 442 [2022-12-14 03:17:47,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 03:17:47,308 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:47,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 133 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:17:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-12-14 03:17:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 375. [2022-12-14 03:17:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 284 states have (on average 1.2464788732394365) internal successors, (354), 290 states have internal predecessors, (354), 78 states have call successors, (78), 13 states have call predecessors, (78), 12 states have return successors, (77), 71 states have call predecessors, (77), 77 states have call successors, (77) [2022-12-14 03:17:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 509 transitions. [2022-12-14 03:17:47,410 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 509 transitions. Word has length 82 [2022-12-14 03:17:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:47,410 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 509 transitions. [2022-12-14 03:17:47,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 03:17:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 509 transitions. [2022-12-14 03:17:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-14 03:17:47,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:47,412 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:47,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 03:17:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 03:17:47,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:17:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 23064549, now seen corresponding path program 3 times [2022-12-14 03:17:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546889910] [2022-12-14 03:17:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:47,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:17:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529523166] [2022-12-14 03:17:47,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:17:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:47,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:47,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 03:17:47,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:17:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:17:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:17:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 152 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:17:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:17:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-12-14 03:17:47,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:47,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546889910] [2022-12-14 03:17:47,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:17:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529523166] [2022-12-14 03:17:47,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529523166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:17:47,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961408313] [2022-12-14 03:17:47,958 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:17:47,958 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:17:47,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:17:47,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:17:47,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:17:51,088 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:17:51,092 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:17:51,112 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:17:57,930 WARN L233 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 108 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 03:18:01,326 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9638#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 24) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:01,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:01,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:01,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2022-12-14 03:18:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955914226] [2022-12-14 03:18:01,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:01,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:18:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:18:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1515, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 03:18:01,330 INFO L87 Difference]: Start difference. First operand 375 states and 509 transitions. Second operand has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-12-14 03:18:02,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:02,026 INFO L93 Difference]: Finished difference Result 1151 states and 1656 transitions. [2022-12-14 03:18:02,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 03:18:02,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 82 [2022-12-14 03:18:02,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:02,030 INFO L225 Difference]: With dead ends: 1151 [2022-12-14 03:18:02,030 INFO L226 Difference]: Without dead ends: 1100 [2022-12-14 03:18:02,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=689, Invalid=2851, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 03:18:02,032 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 359 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:02,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 450 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:18:02,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-12-14 03:18:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1040. [2022-12-14 03:18:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 785 states have (on average 1.2560509554140127) internal successors, (986), 794 states have internal predecessors, (986), 234 states have call successors, (234), 21 states have call predecessors, (234), 20 states have return successors, (233), 224 states have call predecessors, (233), 233 states have call successors, (233) [2022-12-14 03:18:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1453 transitions. [2022-12-14 03:18:02,267 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1453 transitions. Word has length 82 [2022-12-14 03:18:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:02,268 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1453 transitions. [2022-12-14 03:18:02,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.181818181818182) internal successors, (92), 22 states have internal predecessors, (92), 19 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-12-14 03:18:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1453 transitions. [2022-12-14 03:18:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 03:18:02,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:02,269 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:02,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 03:18:02,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:02,470 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:02,470 INFO L85 PathProgramCache]: Analyzing trace with hash -237823764, now seen corresponding path program 1 times [2022-12-14 03:18:02,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:02,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682189378] [2022-12-14 03:18:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:02,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:02,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837822559] [2022-12-14 03:18:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:02,478 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:02,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 03:18:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 03:18:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:18:02,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-12-14 03:18:02,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682189378] [2022-12-14 03:18:02,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837822559] [2022-12-14 03:18:02,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837822559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845789365] [2022-12-14 03:18:02,793 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:18:02,793 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:02,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:02,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:02,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:05,392 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:18:05,395 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:18:05,418 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:10,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13492#(and (<= ~counter~0 23) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:10,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:10,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:10,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2022-12-14 03:18:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74268051] [2022-12-14 03:18:10,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:10,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 03:18:10,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:10,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 03:18:10,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 03:18:10,988 INFO L87 Difference]: Start difference. First operand 1040 states and 1453 transitions. Second operand has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-12-14 03:18:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:11,770 INFO L93 Difference]: Finished difference Result 1518 states and 2107 transitions. [2022-12-14 03:18:11,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 03:18:11,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 88 [2022-12-14 03:18:11,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:11,773 INFO L225 Difference]: With dead ends: 1518 [2022-12-14 03:18:11,773 INFO L226 Difference]: Without dead ends: 820 [2022-12-14 03:18:11,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=760, Invalid=2900, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 03:18:11,775 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 358 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:11,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 497 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:18:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-12-14 03:18:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 764. [2022-12-14 03:18:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 573 states have (on average 1.2076788830715532) internal successors, (692), 578 states have internal predecessors, (692), 168 states have call successors, (168), 23 states have call predecessors, (168), 22 states have return successors, (167), 162 states have call predecessors, (167), 167 states have call successors, (167) [2022-12-14 03:18:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1027 transitions. [2022-12-14 03:18:11,941 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1027 transitions. Word has length 88 [2022-12-14 03:18:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:11,942 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1027 transitions. [2022-12-14 03:18:11,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.125) internal successors, (99), 24 states have internal predecessors, (99), 21 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-12-14 03:18:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1027 transitions. [2022-12-14 03:18:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 03:18:11,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:11,943 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:11,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 03:18:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 03:18:12,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:12,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1700457485, now seen corresponding path program 1 times [2022-12-14 03:18:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:12,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354065143] [2022-12-14 03:18:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:12,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:12,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914841705] [2022-12-14 03:18:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:12,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:12,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:12,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:12,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 03:18:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:12,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 03:18:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 236 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:18:12,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 20 proven. 56 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-14 03:18:12,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354065143] [2022-12-14 03:18:12,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914841705] [2022-12-14 03:18:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914841705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [164283107] [2022-12-14 03:18:12,494 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:18:12,494 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:12,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:12,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:12,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:15,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:18:15,586 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:18:15,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:21,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17503#(and (<= ~counter~0 22) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:21,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:21,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:21,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-12-14 03:18:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898613886] [2022-12-14 03:18:21,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:21,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 03:18:21,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 03:18:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 03:18:21,493 INFO L87 Difference]: Start difference. First operand 764 states and 1027 transitions. Second operand has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-12-14 03:18:22,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:22,182 INFO L93 Difference]: Finished difference Result 782 states and 1046 transitions. [2022-12-14 03:18:22,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 03:18:22,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) Word has length 94 [2022-12-14 03:18:22,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:22,185 INFO L225 Difference]: With dead ends: 782 [2022-12-14 03:18:22,185 INFO L226 Difference]: Without dead ends: 777 [2022-12-14 03:18:22,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 235 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=717, Invalid=2705, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 03:18:22,186 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 267 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:22,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 461 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:18:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-12-14 03:18:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 769. [2022-12-14 03:18:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 578 states have (on average 1.1747404844290656) internal successors, (679), 582 states have internal predecessors, (679), 168 states have call successors, (168), 23 states have call predecessors, (168), 22 states have return successors, (167), 163 states have call predecessors, (167), 167 states have call successors, (167) [2022-12-14 03:18:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 1014 transitions. [2022-12-14 03:18:22,358 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 1014 transitions. Word has length 94 [2022-12-14 03:18:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:22,359 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 1014 transitions. [2022-12-14 03:18:22,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.416666666666667) internal successors, (106), 24 states have internal predecessors, (106), 21 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (24), 20 states have call predecessors, (24), 20 states have call successors, (24) [2022-12-14 03:18:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 1014 transitions. [2022-12-14 03:18:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 03:18:22,361 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:22,361 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:22,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 03:18:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:18:22,562 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash 611923145, now seen corresponding path program 4 times [2022-12-14 03:18:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190582279] [2022-12-14 03:18:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:22,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:22,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473466869] [2022-12-14 03:18:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:18:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:22,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 03:18:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 03:18:22,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 556 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-12-14 03:18:22,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:18:22,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190582279] [2022-12-14 03:18:22,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473466869] [2022-12-14 03:18:22,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473466869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:18:22,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:18:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 03:18:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997845860] [2022-12-14 03:18:22,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:18:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:18:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:18:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:18:22,654 INFO L87 Difference]: Start difference. First operand 769 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:18:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:22,891 INFO L93 Difference]: Finished difference Result 1289 states and 1700 transitions. [2022-12-14 03:18:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:18:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 170 [2022-12-14 03:18:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:22,894 INFO L225 Difference]: With dead ends: 1289 [2022-12-14 03:18:22,894 INFO L226 Difference]: Without dead ends: 809 [2022-12-14 03:18:22,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 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 03:18:22,896 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:22,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 66 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:18:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-12-14 03:18:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 739. [2022-12-14 03:18:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 557 states have (on average 1.1615798922800717) internal successors, (647), 563 states have internal predecessors, (647), 159 states have call successors, (159), 23 states have call predecessors, (159), 22 states have return successors, (158), 152 states have call predecessors, (158), 158 states have call successors, (158) [2022-12-14 03:18:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 964 transitions. [2022-12-14 03:18:23,063 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 964 transitions. Word has length 170 [2022-12-14 03:18:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:23,063 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 964 transitions. [2022-12-14 03:18:23,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 03:18:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 964 transitions. [2022-12-14 03:18:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 03:18:23,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:23,065 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:23,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 03:18:23,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:18:23,266 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1416198823, now seen corresponding path program 5 times [2022-12-14 03:18:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535318741] [2022-12-14 03:18:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:23,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:23,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:23,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873559900] [2022-12-14 03:18:23,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:18:23,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:23,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:23,275 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:23,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 03:18:23,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 03:18:23,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:18:23,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:18:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2022-12-14 03:18:23,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 196 proven. 88 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2022-12-14 03:18:23,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535318741] [2022-12-14 03:18:23,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873559900] [2022-12-14 03:18:23,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873559900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166094352] [2022-12-14 03:18:23,779 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:18:23,779 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:23,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:23,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:23,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:25,308 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2022-12-14 03:18:25,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:18:25,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:28,156 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24370#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:28,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:28,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:28,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 03:18:28,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105306947] [2022-12-14 03:18:28,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:28,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:18:28,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:28,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:18:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:18:28,158 INFO L87 Difference]: Start difference. First operand 739 states and 964 transitions. Second operand has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-12-14 03:18:30,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:30,067 INFO L93 Difference]: Finished difference Result 2696 states and 3684 transitions. [2022-12-14 03:18:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 03:18:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 170 [2022-12-14 03:18:30,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:30,072 INFO L225 Difference]: With dead ends: 2696 [2022-12-14 03:18:30,073 INFO L226 Difference]: Without dead ends: 2417 [2022-12-14 03:18:30,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=456, Invalid=3204, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 03:18:30,074 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 297 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:30,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1022 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 03:18:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-12-14 03:18:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1847. [2022-12-14 03:18:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1394 states have (on average 1.1793400286944047) internal successors, (1644), 1410 states have internal predecessors, (1644), 430 states have call successors, (430), 23 states have call predecessors, (430), 22 states have return successors, (429), 413 states have call predecessors, (429), 429 states have call successors, (429) [2022-12-14 03:18:30,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2503 transitions. [2022-12-14 03:18:30,604 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2503 transitions. Word has length 170 [2022-12-14 03:18:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:30,604 INFO L495 AbstractCegarLoop]: Abstraction has 1847 states and 2503 transitions. [2022-12-14 03:18:30,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 14 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-12-14 03:18:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2503 transitions. [2022-12-14 03:18:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 03:18:30,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:30,608 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 9, 8, 8, 8, 8, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:30,616 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 03:18:30,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:30,810 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:30,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1205136707, now seen corresponding path program 6 times [2022-12-14 03:18:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:30,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976885290] [2022-12-14 03:18:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:30,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:30,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897918421] [2022-12-14 03:18:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:18:30,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:30,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:30,843 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:30,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 03:18:30,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:18:30,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:18:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:18:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 432 proven. 84 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2022-12-14 03:18:31,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 200 proven. 84 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2022-12-14 03:18:31,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976885290] [2022-12-14 03:18:31,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897918421] [2022-12-14 03:18:31,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897918421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:31,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290499315] [2022-12-14 03:18:31,206 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:18:31,206 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:31,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:31,206 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:31,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:33,535 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2022-12-14 03:18:33,571 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:18:33,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:35,527 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32298#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:35,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:35,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:35,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-14 03:18:35,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742657356] [2022-12-14 03:18:35,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:35,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 03:18:35,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:35,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 03:18:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:18:35,529 INFO L87 Difference]: Start difference. First operand 1847 states and 2503 transitions. Second operand has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-12-14 03:18:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:37,353 INFO L93 Difference]: Finished difference Result 3913 states and 5393 transitions. [2022-12-14 03:18:37,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 03:18:37,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) Word has length 170 [2022-12-14 03:18:37,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:37,360 INFO L225 Difference]: With dead ends: 3913 [2022-12-14 03:18:37,360 INFO L226 Difference]: Without dead ends: 3098 [2022-12-14 03:18:37,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 03:18:37,362 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 303 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:37,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 608 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:18:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-12-14 03:18:38,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2611. [2022-12-14 03:18:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 1971 states have (on average 1.1785895484525621) internal successors, (2323), 1993 states have internal predecessors, (2323), 617 states have call successors, (617), 23 states have call predecessors, (617), 22 states have return successors, (616), 594 states have call predecessors, (616), 616 states have call successors, (616) [2022-12-14 03:18:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3556 transitions. [2022-12-14 03:18:38,099 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3556 transitions. Word has length 170 [2022-12-14 03:18:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:38,099 INFO L495 AbstractCegarLoop]: Abstraction has 2611 states and 3556 transitions. [2022-12-14 03:18:38,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.571428571428571) internal successors, (106), 14 states have internal predecessors, (106), 14 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 14 states have call predecessors, (35), 14 states have call successors, (35) [2022-12-14 03:18:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3556 transitions. [2022-12-14 03:18:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 03:18:38,104 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:38,105 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 9, 9, 9, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:38,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 03:18:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:38,306 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1996536153, now seen corresponding path program 7 times [2022-12-14 03:18:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:38,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586831071] [2022-12-14 03:18:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:38,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:38,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407850103] [2022-12-14 03:18:38,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:18:38,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:38,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:38,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 03:18:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 03:18:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 58 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:18:38,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 58 proven. 246 refuted. 0 times theorem prover too weak. 686 trivial. 0 not checked. [2022-12-14 03:18:38,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586831071] [2022-12-14 03:18:38,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:18:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407850103] [2022-12-14 03:18:38,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407850103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:38,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [840705552] [2022-12-14 03:18:38,874 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:18:38,874 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:38,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:38,875 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:38,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:41,930 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 47 for LOIs [2022-12-14 03:18:41,965 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:18:41,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:44,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43211#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:44,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:44,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:18:44,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 23 [2022-12-14 03:18:44,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319538413] [2022-12-14 03:18:44,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:44,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 03:18:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 03:18:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=1308, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 03:18:44,299 INFO L87 Difference]: Start difference. First operand 2611 states and 3556 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-12-14 03:18:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:45,577 INFO L93 Difference]: Finished difference Result 2761 states and 3757 transitions. [2022-12-14 03:18:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 03:18:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) Word has length 170 [2022-12-14 03:18:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:45,582 INFO L225 Difference]: With dead ends: 2761 [2022-12-14 03:18:45,583 INFO L226 Difference]: Without dead ends: 2674 [2022-12-14 03:18:45,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 447 SyntacticMatches, 21 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=792, Invalid=2748, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 03:18:45,584 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 216 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:45,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 384 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:18:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-12-14 03:18:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2646. [2022-12-14 03:18:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2015 states have (on average 1.169727047146402) internal successors, (2357), 2016 states have internal predecessors, (2357), 608 states have call successors, (608), 23 states have call predecessors, (608), 22 states have return successors, (607), 606 states have call predecessors, (607), 607 states have call successors, (607) [2022-12-14 03:18:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3572 transitions. [2022-12-14 03:18:46,318 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3572 transitions. Word has length 170 [2022-12-14 03:18:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:46,318 INFO L495 AbstractCegarLoop]: Abstraction has 2646 states and 3572 transitions. [2022-12-14 03:18:46,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 21 states have call successors, (43), 22 states have call predecessors, (43), 21 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2022-12-14 03:18:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3572 transitions. [2022-12-14 03:18:46,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:18:46,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:46,323 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:18:46,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 03:18:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:46,524 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:18:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1637108617, now seen corresponding path program 2 times [2022-12-14 03:18:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:46,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628441626] [2022-12-14 03:18:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:46,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:46,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:18:46,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485138045] [2022-12-14 03:18:46,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:18:46,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:46,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:46,532 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:46,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 03:18:47,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 03:18:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:18:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 03:18:47,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 254 proven. 210 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2022-12-14 03:18:50,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:52,628 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~u~0#1| |c_ULTIMATE.start_main_~u~0#1|)) (.cse2 (* 2 |c_ULTIMATE.start_main_~v~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~v~0#1| |c_ULTIMATE.start_main_~v~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~u~0#1| 2))) (or (< (div (+ .cse0 (- .cse1) .cse2 (* (- 2) |c_ULTIMATE.start_main_~u~0#1|)) 4) |c_ULTIMATE.start_main_~A~0#1|) (not (= (mod (+ (* 3 |c_ULTIMATE.start_main_~v~0#1| |c_ULTIMATE.start_main_~v~0#1|) .cse0 .cse3 .cse2) 4) 0)) (= (+ .cse0 .cse2) (+ .cse1 .cse3 (* |c_ULTIMATE.start_main_~A~0#1| 4))))) is different from true [2022-12-14 03:19:10,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:10,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628441626] [2022-12-14 03:19:10,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:19:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485138045] [2022-12-14 03:19:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485138045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:19:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573820213] [2022-12-14 03:19:10,988 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:19:10,988 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:10,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:10,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:10,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:13,066 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:19:13,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:19:13,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:24,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52169#(and (<= ~counter~0 22) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:24,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:24,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:19:24,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-12-14 03:19:24,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790939052] [2022-12-14 03:19:24,873 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:24,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 03:19:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:24,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 03:19:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1980, Unknown=2, NotChecked=90, Total=2256 [2022-12-14 03:19:24,874 INFO L87 Difference]: Start difference. First operand 2646 states and 3572 transitions. Second operand has 17 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 03:19:29,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:19:34,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 03:19:37,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:37,070 INFO L93 Difference]: Finished difference Result 3973 states and 5423 transitions. [2022-12-14 03:19:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 03:19:37,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) Word has length 174 [2022-12-14 03:19:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:37,078 INFO L225 Difference]: With dead ends: 3973 [2022-12-14 03:19:37,078 INFO L226 Difference]: Without dead ends: 3173 [2022-12-14 03:19:37,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 393 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=301, Invalid=3123, Unknown=2, NotChecked=114, Total=3540 [2022-12-14 03:19:37,080 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 118 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 49 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:37,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 793 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1057 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 03:19:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3173 states. [2022-12-14 03:19:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3173 to 2966. [2022-12-14 03:19:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2261 states have (on average 1.1671826625386996) internal successors, (2639), 2262 states have internal predecessors, (2639), 682 states have call successors, (682), 23 states have call predecessors, (682), 22 states have return successors, (681), 680 states have call predecessors, (681), 681 states have call successors, (681) [2022-12-14 03:19:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 4002 transitions. [2022-12-14 03:19:38,038 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 4002 transitions. Word has length 174 [2022-12-14 03:19:38,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:38,039 INFO L495 AbstractCegarLoop]: Abstraction has 2966 states and 4002 transitions. [2022-12-14 03:19:38,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 12 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 13 states have call predecessors, (20), 12 states have call successors, (20) [2022-12-14 03:19:38,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 4002 transitions. [2022-12-14 03:19:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:19:38,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:38,043 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 7, 7, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:38,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 03:19:38,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:38,245 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:19:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:38,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1609210665, now seen corresponding path program 3 times [2022-12-14 03:19:38,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:38,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121447535] [2022-12-14 03:19:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:38,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:19:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695559357] [2022-12-14 03:19:38,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:19:38,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:38,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:38,276 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:38,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 03:19:38,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:19:38,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:19:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 03:19:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 133 proven. 4 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-12-14 03:19:38,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 133 proven. 4 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-12-14 03:19:38,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:38,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121447535] [2022-12-14 03:19:38,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:19:38,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695559357] [2022-12-14 03:19:38,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695559357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:38,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669907246] [2022-12-14 03:19:38,710 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:19:38,710 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:38,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:38,711 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:38,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:41,145 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:19:41,149 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:19:41,168 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:19:46,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63626#(and (<= ~counter~0 22) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:19:46,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:19:46,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:19:46,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-12-14 03:19:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833131453] [2022-12-14 03:19:46,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:19:46,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:19:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:19:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:19:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-12-14 03:19:46,628 INFO L87 Difference]: Start difference. First operand 2966 states and 4002 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:19:48,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:19:51,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:19:53,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:19:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:19:54,271 INFO L93 Difference]: Finished difference Result 3103 states and 4140 transitions. [2022-12-14 03:19:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:19:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 03:19:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:19:54,278 INFO L225 Difference]: With dead ends: 3103 [2022-12-14 03:19:54,278 INFO L226 Difference]: Without dead ends: 3069 [2022-12-14 03:19:54,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 486 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 03:19:54,279 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:19:54,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 159 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 178 Invalid, 3 Unknown, 0 Unchecked, 6.6s Time] [2022-12-14 03:19:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2022-12-14 03:19:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2851. [2022-12-14 03:19:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2169 states have (on average 1.1535269709543567) internal successors, (2502), 2179 states have internal predecessors, (2502), 640 states have call successors, (640), 42 states have call predecessors, (640), 41 states have return successors, (639), 629 states have call predecessors, (639), 639 states have call successors, (639) [2022-12-14 03:19:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 3781 transitions. [2022-12-14 03:19:55,495 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 3781 transitions. Word has length 174 [2022-12-14 03:19:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:19:55,496 INFO L495 AbstractCegarLoop]: Abstraction has 2851 states and 3781 transitions. [2022-12-14 03:19:55,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 10 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 03:19:55,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 3781 transitions. [2022-12-14 03:19:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:19:55,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:19:55,505 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 9, 9, 9, 9, 8, 8, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:19:55,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 03:19:55,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:55,707 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:19:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:19:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -749827065, now seen corresponding path program 4 times [2022-12-14 03:19:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:19:55,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147692175] [2022-12-14 03:19:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:19:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:19:55,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:19:55,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162923558] [2022-12-14 03:19:55,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:19:55,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:19:55,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:19:55,740 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:19:55,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 03:19:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:19:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 03:19:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:19:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 286 proven. 164 refuted. 0 times theorem prover too weak. 626 trivial. 0 not checked. [2022-12-14 03:19:55,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:19:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 94 proven. 216 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2022-12-14 03:19:56,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:19:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147692175] [2022-12-14 03:19:56,177 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:19:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162923558] [2022-12-14 03:19:56,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162923558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:19:56,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246843466] [2022-12-14 03:19:56,178 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 03:19:56,178 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:19:56,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:19:56,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:19:56,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:19:59,521 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-12-14 03:19:59,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2022-12-14 03:19:59,546 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:20:09,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73571#(and (<= ~counter~0 22) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:20:09,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:20:09,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:20:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-12-14 03:20:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734718914] [2022-12-14 03:20:09,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:20:09,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 03:20:09,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:20:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 03:20:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 03:20:09,053 INFO L87 Difference]: Start difference. First operand 2851 states and 3781 transitions. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 22 states have call predecessors, (40), 22 states have call successors, (40) [2022-12-14 03:20:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:20:11,948 INFO L93 Difference]: Finished difference Result 4968 states and 6742 transitions. [2022-12-14 03:20:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 03:20:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 22 states have call predecessors, (40), 22 states have call successors, (40) Word has length 174 [2022-12-14 03:20:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:20:11,957 INFO L225 Difference]: With dead ends: 4968 [2022-12-14 03:20:11,957 INFO L226 Difference]: Without dead ends: 4171 [2022-12-14 03:20:11,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 478 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=514, Invalid=2908, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 03:20:11,959 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 236 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:20:11,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1014 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 03:20:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2022-12-14 03:20:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3163. [2022-12-14 03:20:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 2409 states have (on average 1.1589871315898712) internal successors, (2792), 2419 states have internal predecessors, (2792), 712 states have call successors, (712), 42 states have call predecessors, (712), 41 states have return successors, (711), 701 states have call predecessors, (711), 711 states have call successors, (711) [2022-12-14 03:20:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 4215 transitions. [2022-12-14 03:20:13,078 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 4215 transitions. Word has length 174 [2022-12-14 03:20:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:20:13,078 INFO L495 AbstractCegarLoop]: Abstraction has 3163 states and 4215 transitions. [2022-12-14 03:20:13,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 22 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 22 states have call predecessors, (40), 22 states have call successors, (40) [2022-12-14 03:20:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 4215 transitions. [2022-12-14 03:20:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 03:20:13,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:20:13,083 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:13,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 03:20:13,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 03:20:13,284 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:20:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:20:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash 556813163, now seen corresponding path program 5 times [2022-12-14 03:20:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:20:13,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405763143] [2022-12-14 03:20:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:20:13,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:20:13,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:20:13,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626669689] [2022-12-14 03:20:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:20:13,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:20:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:20:13,315 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:20:13,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 03:20:16,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 03:20:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 03:20:16,923 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 03:20:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 03:20:17,019 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 03:20:17,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 03:20:17,019 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 03:20:17,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 03:20:17,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 03:20:17,231 INFO L445 BasicCegarLoop]: Path program histogram: [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:20:17,240 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 03:20:17,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:20:17 BoogieIcfgContainer [2022-12-14 03:20:17,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 03:20:17,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 03:20:17,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 03:20:17,301 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 03:20:17,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:35" (3/4) ... [2022-12-14 03:20:17,303 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 03:20:17,347 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 03:20:17,347 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 03:20:17,348 INFO L158 Benchmark]: Toolchain (without parser) took 281890.33ms. Allocated memory was 134.2MB in the beginning and 408.9MB in the end (delta: 274.7MB). Free memory was 99.3MB in the beginning and 119.8MB in the end (delta: -20.5MB). Peak memory consumption was 255.2MB. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 100.7MB. Free memory is still 48.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.00ms. Allocated memory is still 134.2MB. Free memory was 99.3MB in the beginning and 88.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.68ms. Allocated memory is still 134.2MB. Free memory was 88.5MB in the beginning and 86.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: Boogie Preprocessor took 15.42ms. Allocated memory is still 134.2MB. Free memory was 86.8MB in the beginning and 85.9MB in the end (delta: 904.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: RCFGBuilder took 251.48ms. Allocated memory is still 134.2MB. Free memory was 85.5MB in the beginning and 73.5MB in the end (delta: 12.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: TraceAbstraction took 281381.03ms. Allocated memory was 134.2MB in the beginning and 408.9MB in the end (delta: 274.7MB). Free memory was 72.5MB in the beginning and 126.0MB in the end (delta: -53.5MB). Peak memory consumption was 221.6MB. Max. memory is 16.1GB. [2022-12-14 03:20:17,348 INFO L158 Benchmark]: Witness Printer took 46.07ms. Allocated memory is still 408.9MB. Free memory was 126.0MB in the beginning and 119.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 03:20:17,349 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 100.7MB. Free memory is still 48.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 168.00ms. Allocated memory is still 134.2MB. Free memory was 99.3MB in the beginning and 88.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.68ms. Allocated memory is still 134.2MB. Free memory was 88.5MB in the beginning and 86.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.42ms. Allocated memory is still 134.2MB. Free memory was 86.8MB in the beginning and 85.9MB in the end (delta: 904.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 251.48ms. Allocated memory is still 134.2MB. Free memory was 85.5MB in the beginning and 73.5MB in the end (delta: 12.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 281381.03ms. Allocated memory was 134.2MB in the beginning and 408.9MB in the end (delta: 274.7MB). Free memory was 72.5MB in the beginning and 126.0MB in the end (delta: -53.5MB). Peak memory consumption was 221.6MB. Max. memory is 16.1GB. * Witness Printer took 46.07ms. Allocated memory is still 408.9MB. Free memory was 126.0MB in the beginning and 119.8MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L25] CALL assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L25] RET assume_abort_if_not((((long long) R - 1) * ((long long) R - 1)) < A) VAL [A=573, counter=0, R=23] [L27] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, counter=0] [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(A % 2 == 1) VAL [A=573, counter=0, R=23] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [A=573, counter=0, r=-44, R=23, u=47, v=1] [L34] EXPR counter++ VAL [A=573, counter=1, counter++=0, r=-44, R=23, u=47, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=1, R=23, r=-44, u=47, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=1, r=-44, R=23, u=47, v=1] [L39] EXPR counter++ VAL [A=573, counter=2, counter++=1, R=23, r=-44, u=47, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=2] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=2, r=-44, R=23, u=47, v=1] [L41] COND TRUE !(r > 0) VAL [A=573, counter=2, r=-44, R=23, u=47, v=1] [L47] EXPR counter++ VAL [A=573, counter=3, counter++=2, R=23, r=-44, u=47, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=3] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=3, R=23, r=-44, u=47, v=1] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=3, r=3, R=23, u=49, v=1] [L47] EXPR counter++ VAL [A=573, counter=4, counter++=3, R=23, r=3, u=49, v=1] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=4] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=4, R=23, r=3, u=49, v=1] [L49] COND TRUE !(r < 0) VAL [A=573, counter=4, r=3, R=23, u=49, v=1] [L34] EXPR counter++ VAL [A=573, counter=5, counter++=4, R=23, r=3, u=49, v=1] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=5] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=5, r=3, R=23, u=49, v=1] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=5, r=3, R=23, u=49, v=1] [L39] EXPR counter++ VAL [A=573, counter=6, counter++=5, r=3, R=23, u=49, v=1] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=6] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=6, r=3, R=23, u=49, v=1] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=6, r=2, R=23, u=49, v=3] [L39] EXPR counter++ VAL [A=573, counter=7, counter++=6, r=2, R=23, u=49, v=3] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=7] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=7, R=23, r=2, u=49, v=3] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=7, r=-1, R=23, u=49, v=5] [L39] EXPR counter++ VAL [A=573, counter=8, counter++=7, r=-1, R=23, u=49, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=8] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=8, r=-1, R=23, u=49, v=5] [L41] COND TRUE !(r > 0) VAL [A=573, counter=8, R=23, r=-1, u=49, v=5] [L47] EXPR counter++ VAL [A=573, counter=9, counter++=8, R=23, r=-1, u=49, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=9] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=9, R=23, r=-1, u=49, v=5] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=9, r=48, R=23, u=51, v=5] [L47] EXPR counter++ VAL [A=573, counter=10, counter++=9, R=23, r=48, u=51, v=5] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=10] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=10, R=23, r=48, u=51, v=5] [L49] COND TRUE !(r < 0) VAL [A=573, counter=10, R=23, r=48, u=51, v=5] [L34] EXPR counter++ VAL [A=573, counter=11, counter++=10, r=48, R=23, u=51, v=5] [L34] COND TRUE counter++<20 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=11] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=11] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=11, r=48, R=23, u=51, v=5] [L36] COND FALSE !(!(r != 0)) VAL [A=573, counter=11, r=48, R=23, u=51, v=5] [L39] EXPR counter++ VAL [A=573, counter=12, counter++=11, r=48, R=23, u=51, v=5] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=12] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=12] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=12, R=23, r=48, u=51, v=5] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=12, R=23, r=43, u=51, v=7] [L39] EXPR counter++ VAL [A=573, counter=13, counter++=12, R=23, r=43, u=51, v=7] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=13] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=13, R=23, r=43, u=51, v=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=13, R=23, r=36, u=51, v=9] [L39] EXPR counter++ VAL [A=573, counter=14, counter++=13, R=23, r=36, u=51, v=9] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=14] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=14] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=14, R=23, r=36, u=51, v=9] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=14, r=27, R=23, u=51, v=11] [L39] EXPR counter++ VAL [A=573, counter=15, counter++=14, R=23, r=27, u=51, v=11] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=15] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=15] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=15, r=27, R=23, u=51, v=11] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=15, R=23, r=16, u=51, v=13] [L39] EXPR counter++ VAL [A=573, counter=16, counter++=15, r=16, R=23, u=51, v=13] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=16] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=16] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=16, r=16, R=23, u=51, v=13] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=16, r=3, R=23, u=51, v=15] [L39] EXPR counter++ VAL [A=573, counter=17, counter++=16, r=3, R=23, u=51, v=15] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=17] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=17, r=3, R=23, u=51, v=15] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [A=573, counter=17, r=-12, R=23, u=51, v=17] [L39] EXPR counter++ VAL [A=573, counter=18, counter++=17, r=-12, R=23, u=51, v=17] [L39] COND TRUE counter++<20 [L40] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=18] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=18] [L40] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=18, R=23, r=-12, u=51, v=17] [L41] COND TRUE !(r > 0) VAL [A=573, counter=18, r=-12, R=23, u=51, v=17] [L47] EXPR counter++ VAL [A=573, counter=19, counter++=18, r=-12, R=23, u=51, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=19] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=19] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=19, R=23, r=-12, u=51, v=17] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [A=573, counter=19, R=23, r=39, u=53, v=17] [L47] EXPR counter++ VAL [A=573, counter=20, counter++=19, R=23, r=39, u=53, v=17] [L47] COND TRUE counter++<20 [L48] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, counter=20] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=20] [L48] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L49] COND TRUE !(r < 0) VAL [A=573, counter=20, r=39, R=23, u=53, v=17] [L34] EXPR counter++ VAL [A=573, counter=21, counter++=20, R=23, r=39, u=53, v=17] [L34] COND FALSE !(counter++<20) [L56] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, counter=21] [L12] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=21] [L14] reach_error() VAL [\old(cond)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 281.3s, OverallIterations: 25, TraceHistogramMax: 21, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 45.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 mSolverCounterUnknown, 2781 SdHoareTripleChecker+Valid, 33.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2745 mSDsluCounter, 7334 SdHoareTripleChecker+Invalid, 33.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5778 mSDsCounter, 1189 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6891 IncrementalHoareTripleChecker+Invalid, 8090 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1189 mSolverCounterUnsat, 1556 mSDtfsCounter, 6891 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5336 GetRequests, 4557 SyntacticMatches, 51 SemanticMatches, 728 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11084 ImplicationChecksByTransitivity, 166.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3163occurred in iteration=24, InterpolantAutomatonStates: 391, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 2910 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 27.0s InterpolantComputationTime, 2163 NumberOfCodeBlocks, 2006 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 3407 ConstructedInterpolants, 76 QuantifiedInterpolants, 12355 SizeOfPredicates, 95 NumberOfNonLiveVariables, 4740 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 40 InterpolantComputations, 8 PerfectInterpolantSequences, 11501/14442 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 3, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 17, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 14, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 10, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 6, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 30, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 46, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 17, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 6, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 146, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 03:20:17,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17e79fb7-f81f-40a2-bcf9-5f8fa6c376ef/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE