./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/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_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/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_94e2bc33-8447-467c-9d36-165aa436dec0/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 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:32:35,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:32:35,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:32:35,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:32:35,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:32:35,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:32:35,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:32:35,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:32:35,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:32:35,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:32:35,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:32:35,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:32:35,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:32:35,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:32:35,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:32:35,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:32:35,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:32:35,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:32:35,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:32:35,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:32:35,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:32:35,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:32:35,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:32:35,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:32:35,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:32:35,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:32:35,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:32:35,463 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:32:35,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:32:35,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:32:35,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:32:35,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:32:35,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:32:35,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:32:35,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:32:35,469 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:32:35,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:32:35,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:32:35,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:32:35,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:32:35,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:32:35,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:32:35,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:32:35,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:32:35,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:32:35,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:32:35,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:32:35,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:32:35,495 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:32:35,495 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:32:35,495 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:32:35,495 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:32:35,495 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:32:35,496 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:32:35,496 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:32:35,496 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:32:35,496 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:32:35,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:32:35,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:32:35,497 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:32:35,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:32:35,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:32:35,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:32:35,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:32:35,498 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:32:35,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:32:35,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:32:35,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:32:35,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:32:35,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:32:35,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:32:35,500 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_94e2bc33-8447-467c-9d36-165aa436dec0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f971bd1a6fba471cdece6d295ca31488341eb806ea8364f7549d05755c7a031 [2022-12-14 05:32:35,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:32:35,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:32:35,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:32:35,696 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:32:35,696 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:32:35,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-12-14 05:32:38,219 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:32:38,366 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:32:38,367 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c [2022-12-14 05:32:38,371 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/data/d9b3ffa35/a0deccc471364765822777102dfe9a74/FLAG77e4d00f2 [2022-12-14 05:32:38,775 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/data/d9b3ffa35/a0deccc471364765822777102dfe9a74 [2022-12-14 05:32:38,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:32:38,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:32:38,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:38,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:32:38,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:32:38,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236c1688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38, skipping insertion in model container [2022-12-14 05:32:38,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:32:38,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:32:38,900 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_94e2bc33-8447-467c-9d36-165aa436dec0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-12-14 05:32:38,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:38,918 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:32:38,927 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_94e2bc33-8447-467c-9d36-165aa436dec0/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound10.c[526,539] [2022-12-14 05:32:38,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:32:38,941 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:32:38,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38 WrapperNode [2022-12-14 05:32:38,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:32:38,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:32:38,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:32:38,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:32:38,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,964 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-12-14 05:32:38,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:32:38,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:32:38,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:32:38,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:32:38,972 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,978 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:32:38,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:32:38,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:32:38,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:32:38,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (1/1) ... [2022-12-14 05:32:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:32:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:39,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:32:39,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:32:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:32:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:32:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:32:39,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:32:39,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 05:32:39,045 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 05:32:39,123 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:32:39,124 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:32:39,240 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:32:39,273 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:32:39,273 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 05:32:39,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:32:39 BoogieIcfgContainer [2022-12-14 05:32:39,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:32:39,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:32:39,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:32:39,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:32:39,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:32:38" (1/3) ... [2022-12-14 05:32:39,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a91671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:32:39, skipping insertion in model container [2022-12-14 05:32:39,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:32:38" (2/3) ... [2022-12-14 05:32:39,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a91671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:32:39, skipping insertion in model container [2022-12-14 05:32:39,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:32:39" (3/3) ... [2022-12-14 05:32:39,285 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound10.c [2022-12-14 05:32:39,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:32:39,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:32:39,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:32:39,357 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;@67b5efe8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:32:39,357 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:32:39,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 05:32:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:32:39,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:39,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:39,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:39,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1291730102, now seen corresponding path program 1 times [2022-12-14 05:32:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77718820] [2022-12-14 05:32:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:39,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77718820] [2022-12-14 05:32:39,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 05:32:39,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840185934] [2022-12-14 05:32:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:39,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:39,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:39,497 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:39,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:32:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 05:32:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:32:39,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:32:39,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840185934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:39,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:32:39,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:32:39,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594958143] [2022-12-14 05:32:39,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:39,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 05:32:39,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:39,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 05:32:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 05:32:39,601 INFO L87 Difference]: Start difference. First operand has 22 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:39,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:39,632 INFO L93 Difference]: Finished difference Result 43 states and 74 transitions. [2022-12-14 05:32:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 05:32:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:32:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:39,642 INFO L225 Difference]: With dead ends: 43 [2022-12-14 05:32:39,642 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 05:32:39,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 05:32:39,649 INFO L413 NwaCegarLoop]: 28 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, 28 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 05:32:39,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:32:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 05:32:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 05:32:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:32:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2022-12-14 05:32:39,681 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 7 [2022-12-14 05:32:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:39,681 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2022-12-14 05:32:39,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2022-12-14 05:32:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:32:39,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:39,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:39,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:32:39,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:39,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 829671692, now seen corresponding path program 1 times [2022-12-14 05:32:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:39,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216525049] [2022-12-14 05:32:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:39,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:32:40,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216525049] [2022-12-14 05:32:40,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216525049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:40,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:32:40,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:32:40,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758123917] [2022-12-14 05:32:40,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:40,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:32:40,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:32:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:32:40,046 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:40,086 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2022-12-14 05:32:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:32:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:32:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:40,087 INFO L225 Difference]: With dead ends: 33 [2022-12-14 05:32:40,087 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 05:32:40,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 05:32:40,088 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:40,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:32:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 05:32:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-12-14 05:32:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:32:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-12-14 05:32:40,094 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 7 [2022-12-14 05:32:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:40,095 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-12-14 05:32:40,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-12-14 05:32:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:32:40,095 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:40,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:32:40,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash -166824855, now seen corresponding path program 1 times [2022-12-14 05:32:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:40,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663038914] [2022-12-14 05:32:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:40,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663038914] [2022-12-14 05:32:40,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 05:32:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683594647] [2022-12-14 05:32:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:40,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:40,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:32:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:32:40,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:32:40,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:32:40,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683594647] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:40,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:32:40,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:32:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189297] [2022-12-14 05:32:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:32:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:32:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:32:40,183 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:40,202 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-12-14 05:32:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:32:40,202 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:32:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:40,203 INFO L225 Difference]: With dead ends: 39 [2022-12-14 05:32:40,203 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 05:32:40,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 05:32:40,204 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:40,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:32:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 05:32:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 05:32:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:32:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-12-14 05:32:40,209 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 9 [2022-12-14 05:32:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:40,209 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-12-14 05:32:40,209 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:32:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-12-14 05:32:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:32:40,209 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:40,210 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:40,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:32:40,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 05:32:40,412 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -439138420, now seen corresponding path program 1 times [2022-12-14 05:32:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:40,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101560063] [2022-12-14 05:32:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:32:40,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101560063] [2022-12-14 05:32:40,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101560063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:40,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:32:40,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:32:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809447253] [2022-12-14 05:32:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:32:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:32:40,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:32:40,594 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:32:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:40,636 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-14 05:32:40,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:32:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 05:32:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:40,638 INFO L225 Difference]: With dead ends: 39 [2022-12-14 05:32:40,638 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 05:32:40,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 05:32:40,638 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:40,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 84 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:32:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 05:32:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-12-14 05:32:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 3 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 05:32:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-12-14 05:32:40,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-12-14 05:32:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:40,644 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-12-14 05:32:40,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:32:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-12-14 05:32:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:32:40,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:40,645 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:40,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:32:40,645 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -235147060, now seen corresponding path program 1 times [2022-12-14 05:32:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:40,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287159638] [2022-12-14 05:32:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:40,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:40,653 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:40,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233998710] [2022-12-14 05:32:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:40,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:40,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:40,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:32:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:40,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:32:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:32:40,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:32:40,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:40,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287159638] [2022-12-14 05:32:40,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:40,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233998710] [2022-12-14 05:32:40,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233998710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:40,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976907793] [2022-12-14 05:32:40,908 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 05:32:40,908 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:40,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:40,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:40,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:41,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2022-12-14 05:32:41,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:41,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [976907793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:41,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:41,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-12-14 05:32:41,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840517347] [2022-12-14 05:32:41,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:41,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:32:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:41,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:32:41,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:32:41,620 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 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 05:32:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:41,754 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-12-14 05:32:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:32:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 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 17 [2022-12-14 05:32:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:41,755 INFO L225 Difference]: With dead ends: 49 [2022-12-14 05:32:41,755 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 05:32:41,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:32:41,756 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:41,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:32:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 05:32:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-12-14 05:32:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:32:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-12-14 05:32:41,763 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2022-12-14 05:32:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:41,763 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-12-14 05:32:41,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (3), 1 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 05:32:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-12-14 05:32:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 05:32:41,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:41,765 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:41,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:32:41,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:41,966 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:41,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2012527405, now seen corresponding path program 1 times [2022-12-14 05:32:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:41,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791452054] [2022-12-14 05:32:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:41,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:41,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:41,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876960304] [2022-12-14 05:32:41,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:41,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:41,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:41,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:42,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:32:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:32:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:42,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:32:42,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:32:42,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791452054] [2022-12-14 05:32:42,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876960304] [2022-12-14 05:32:42,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876960304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:42,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655389707] [2022-12-14 05:32:42,278 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:32:42,278 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:42,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:42,278 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:42,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:42,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2022-12-14 05:32:42,548 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [655389707] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:43,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:43,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 7] total 19 [2022-12-14 05:32:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617704178] [2022-12-14 05:32:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:43,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:32:43,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:32:43,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:32:43,537 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:32:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:43,703 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2022-12-14 05:32:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:32:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 05:32:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:43,704 INFO L225 Difference]: With dead ends: 70 [2022-12-14 05:32:43,704 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 05:32:43,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:32:43,705 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:43,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:32:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 05:32:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 05:32:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:32:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-12-14 05:32:43,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 25 [2022-12-14 05:32:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:43,711 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-12-14 05:32:43,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:32:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-12-14 05:32:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 05:32:43,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:43,711 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:43,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:32:43,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:43,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2127759890, now seen corresponding path program 1 times [2022-12-14 05:32:43,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373700177] [2022-12-14 05:32:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:43,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006062983] [2022-12-14 05:32:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:43,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:43,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:32:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:43,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:32:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:32:44,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 05:32:44,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373700177] [2022-12-14 05:32:44,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:44,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006062983] [2022-12-14 05:32:44,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006062983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:44,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767596340] [2022-12-14 05:32:44,034 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:32:44,034 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:44,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:44,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:44,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:45,383 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:32:45,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:46,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1200#(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 05:32:46,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-12-14 05:32:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061050764] [2022-12-14 05:32:46,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:32:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:32:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:32:46,152 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 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 05:32:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:46,221 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-12-14 05:32:46,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:32:46,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 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 27 [2022-12-14 05:32:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:46,223 INFO L225 Difference]: With dead ends: 109 [2022-12-14 05:32:46,223 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 05:32:46,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:32:46,224 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:46,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 151 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:32:46,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 05:32:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-12-14 05:32:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 05:32:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-12-14 05:32:46,235 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 27 [2022-12-14 05:32:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:46,236 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-12-14 05:32:46,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 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 05:32:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-12-14 05:32:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 05:32:46,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:46,236 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 05:32:46,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 05:32:46,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:46,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:46,439 INFO L85 PathProgramCache]: Analyzing trace with hash 747162997, now seen corresponding path program 1 times [2022-12-14 05:32:46,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:46,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732385284] [2022-12-14 05:32:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:46,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:46,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:46,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798390342] [2022-12-14 05:32:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:46,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:46,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:46,463 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:46,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:32:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:46,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:32:46,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 05:32:46,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 05:32:46,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732385284] [2022-12-14 05:32:46,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798390342] [2022-12-14 05:32:46,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798390342] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:46,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1422151147] [2022-12-14 05:32:46,660 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 05:32:46,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:46,660 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:46,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:46,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:47,879 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:32:47,882 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:48,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1719#(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 05:32:48,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:48,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:48,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-12-14 05:32:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417505554] [2022-12-14 05:32:48,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:48,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:32:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:48,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:32:48,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:32:48,626 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 05:32:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:48,921 INFO L93 Difference]: Finished difference Result 131 states and 161 transitions. [2022-12-14 05:32:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:32:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-12-14 05:32:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:48,923 INFO L225 Difference]: With dead ends: 131 [2022-12-14 05:32:48,923 INFO L226 Difference]: Without dead ends: 111 [2022-12-14 05:32:48,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:32:48,924 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:48,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 119 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:32:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-14 05:32:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-12-14 05:32:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 73 states have internal predecessors, (80), 25 states have call successors, (25), 14 states have call predecessors, (25), 14 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 05:32:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 127 transitions. [2022-12-14 05:32:48,934 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 127 transitions. Word has length 35 [2022-12-14 05:32:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:48,934 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 127 transitions. [2022-12-14 05:32:48,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 05:32:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 127 transitions. [2022-12-14 05:32:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 05:32:48,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:48,935 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:48,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 05:32:49,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 05:32:49,138 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 387112662, now seen corresponding path program 1 times [2022-12-14 05:32:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:49,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586738622] [2022-12-14 05:32:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:49,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049682571] [2022-12-14 05:32:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:49,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:49,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:49,149 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:49,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:32:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:49,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:32:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 05:32:49,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 05:32:49,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586738622] [2022-12-14 05:32:49,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049682571] [2022-12-14 05:32:49,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049682571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:49,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186436179] [2022-12-14 05:32:49,314 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:32:49,314 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:49,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:49,314 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:49,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:50,344 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:32:50,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:51,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2343#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 05:32:51,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:51,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:51,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-14 05:32:51,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622174323] [2022-12-14 05:32:51,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 05:32:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 05:32:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:32:51,973 INFO L87 Difference]: Start difference. First operand 109 states and 127 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 05:32:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:52,103 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2022-12-14 05:32:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:32:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-12-14 05:32:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:52,104 INFO L225 Difference]: With dead ends: 125 [2022-12-14 05:32:52,104 INFO L226 Difference]: Without dead ends: 121 [2022-12-14 05:32:52,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:32:52,105 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:52,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 73 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:32:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-14 05:32:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2022-12-14 05:32:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 78 states have internal predecessors, (86), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 05:32:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 135 transitions. [2022-12-14 05:32:52,115 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 135 transitions. Word has length 43 [2022-12-14 05:32:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:52,115 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 135 transitions. [2022-12-14 05:32:52,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 05:32:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 135 transitions. [2022-12-14 05:32:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 05:32:52,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:52,116 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:52,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:32:52,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:52,318 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1125945480, now seen corresponding path program 1 times [2022-12-14 05:32:52,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:52,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115385479] [2022-12-14 05:32:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:52,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:52,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:52,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451564101] [2022-12-14 05:32:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:52,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:52,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:52,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:32:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:32:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 05:32:52,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 05:32:52,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115385479] [2022-12-14 05:32:52,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451564101] [2022-12-14 05:32:52,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451564101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999795963] [2022-12-14 05:32:52,480 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:32:52,480 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:52,480 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:52,480 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:52,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:53,653 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:32:53,656 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:32:55,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2999#(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 05:32:55,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:32:55,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:32:55,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-12-14 05:32:55,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273379691] [2022-12-14 05:32:55,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:32:55,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 05:32:55,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:32:55,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 05:32:55,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:32:55,056 INFO L87 Difference]: Start difference. First operand 117 states and 135 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 05:32:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:55,188 INFO L93 Difference]: Finished difference Result 214 states and 247 transitions. [2022-12-14 05:32:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:32:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 48 [2022-12-14 05:32:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:55,190 INFO L225 Difference]: With dead ends: 214 [2022-12-14 05:32:55,190 INFO L226 Difference]: Without dead ends: 192 [2022-12-14 05:32:55,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:32:55,191 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 77 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:55,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 176 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:32:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-14 05:32:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 187. [2022-12-14 05:32:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 126 states have internal predecessors, (137), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 05:32:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 215 transitions. [2022-12-14 05:32:55,206 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 215 transitions. Word has length 48 [2022-12-14 05:32:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:55,206 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 215 transitions. [2022-12-14 05:32:55,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-12-14 05:32:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 215 transitions. [2022-12-14 05:32:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 05:32:55,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:55,207 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:55,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:32:55,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:32:55,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:32:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1127123487, now seen corresponding path program 1 times [2022-12-14 05:32:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:32:55,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546035801] [2022-12-14 05:32:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:32:55,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:32:55,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146987733] [2022-12-14 05:32:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:55,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:55,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:32:55,433 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:32:55,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:32:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 05:32:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:55,663 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:32:55,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:32:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 05:32:57,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:32:57,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546035801] [2022-12-14 05:32:57,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:32:57,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146987733] [2022-12-14 05:32:57,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146987733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:32:57,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085384773] [2022-12-14 05:32:57,220 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:32:57,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:32:57,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:32:57,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:32:57,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:32:59,086 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:32:59,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:00,617 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3936#(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 05:33:00,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:00,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:33:00,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-14 05:33:00,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909876605] [2022-12-14 05:33:00,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:00,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 05:33:00,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 05:33:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:33:00,618 INFO L87 Difference]: Start difference. First operand 187 states and 215 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:33:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:02,446 INFO L93 Difference]: Finished difference Result 227 states and 254 transitions. [2022-12-14 05:33:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:33:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 56 [2022-12-14 05:33:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:02,448 INFO L225 Difference]: With dead ends: 227 [2022-12-14 05:33:02,448 INFO L226 Difference]: Without dead ends: 223 [2022-12-14 05:33:02,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:33:02,449 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:02,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 130 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:33:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-12-14 05:33:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 218. [2022-12-14 05:33:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 150 states have internal predecessors, (161), 42 states have call successors, (42), 32 states have call predecessors, (42), 31 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 05:33:02,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-12-14 05:33:02,481 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 56 [2022-12-14 05:33:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:02,481 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-12-14 05:33:02,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 05:33:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-12-14 05:33:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 05:33:02,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:02,482 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:02,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:33:02,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:02,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:02,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -143001442, now seen corresponding path program 1 times [2022-12-14 05:33:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140734630] [2022-12-14 05:33:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:02,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:33:02,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059028070] [2022-12-14 05:33:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:02,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:02,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:02,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:02,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:33:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:02,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 05:33:02,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 05:33:02,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-14 05:33:03,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140734630] [2022-12-14 05:33:03,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:33:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059028070] [2022-12-14 05:33:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059028070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:03,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893900460] [2022-12-14 05:33:03,290 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:33:03,290 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:33:03,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:33:03,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:33:03,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:33:05,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-12-14 05:33:05,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:06,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5004#(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 05:33:06,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:06,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:33:06,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-14 05:33:06,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492872072] [2022-12-14 05:33:06,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:06,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:33:06,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:33:06,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:33:06,818 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 05:33:09,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:33:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:09,309 INFO L93 Difference]: Finished difference Result 241 states and 268 transitions. [2022-12-14 05:33:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 05:33:09,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 67 [2022-12-14 05:33:09,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:09,310 INFO L225 Difference]: With dead ends: 241 [2022-12-14 05:33:09,310 INFO L226 Difference]: Without dead ends: 214 [2022-12-14 05:33:09,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 05:33:09,311 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:09,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 123 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 05:33:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-14 05:33:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2022-12-14 05:33:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 133 states have internal predecessors, (147), 37 states have call successors, (37), 29 states have call predecessors, (37), 28 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 05:33:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 218 transitions. [2022-12-14 05:33:09,352 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 218 transitions. Word has length 67 [2022-12-14 05:33:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:09,353 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 218 transitions. [2022-12-14 05:33:09,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-12-14 05:33:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 218 transitions. [2022-12-14 05:33:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-14 05:33:09,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:09,354 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:09,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:33:09,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:09,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:09,556 INFO L85 PathProgramCache]: Analyzing trace with hash -319401384, now seen corresponding path program 1 times [2022-12-14 05:33:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:09,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568526762] [2022-12-14 05:33:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:09,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:09,574 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:33:09,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275117782] [2022-12-14 05:33:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:09,575 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:09,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:33:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:33:09,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-14 05:33:09,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:33:09,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568526762] [2022-12-14 05:33:09,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:33:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275117782] [2022-12-14 05:33:09,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275117782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:33:09,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:33:09,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:33:09,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591164430] [2022-12-14 05:33:09,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:33:09,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:33:09,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:33:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:33:09,646 INFO L87 Difference]: Start difference. First operand 196 states and 218 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:33:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:09,708 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2022-12-14 05:33:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:33:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 77 [2022-12-14 05:33:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:09,710 INFO L225 Difference]: With dead ends: 215 [2022-12-14 05:33:09,710 INFO L226 Difference]: Without dead ends: 185 [2022-12-14 05:33:09,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:33:09,711 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:09,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 89 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:33:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-14 05:33:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-12-14 05:33:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 122 states have (on average 1.098360655737705) internal successors, (134), 124 states have internal predecessors, (134), 33 states have call successors, (33), 26 states have call predecessors, (33), 26 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-12-14 05:33:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 199 transitions. [2022-12-14 05:33:09,741 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 199 transitions. Word has length 77 [2022-12-14 05:33:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:09,741 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 199 transitions. [2022-12-14 05:33:09,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-12-14 05:33:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 199 transitions. [2022-12-14 05:33:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 05:33:09,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:09,742 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:33:09,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 05:33:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:09,944 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:09,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1379671488, now seen corresponding path program 2 times [2022-12-14 05:33:09,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:09,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371589510] [2022-12-14 05:33:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:09,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:33:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562752757] [2022-12-14 05:33:09,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:33:09,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:09,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:09,962 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:09,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:33:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 05:33:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 05:33:10,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 05:33:10,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 41 proven. 32 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-12-14 05:33:11,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:33:11,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371589510] [2022-12-14 05:33:11,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:33:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562752757] [2022-12-14 05:33:11,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562752757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:11,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1874888253] [2022-12-14 05:33:11,083 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:33:11,083 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:33:11,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:33:11,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:33:11,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:33:12,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:33:12,993 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:33:14,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6925#(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 05:33:14,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:33:14,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:33:14,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2022-12-14 05:33:14,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415603253] [2022-12-14 05:33:14,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:33:14,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:33:14,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:33:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:33:14,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:33:14,560 INFO L87 Difference]: Start difference. First operand 182 states and 199 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 05:33:21,229 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification. DAG size of input: 38 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:33:23,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:33:25,403 WARN L539 Checker$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 05:33:27,556 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 05:33:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:33:27,670 INFO L93 Difference]: Finished difference Result 199 states and 223 transitions. [2022-12-14 05:33:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:33:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 79 [2022-12-14 05:33:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:33:27,672 INFO L225 Difference]: With dead ends: 199 [2022-12-14 05:33:27,672 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 05:33:27,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 201 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:33:27,672 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 51 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:33:27,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 444 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 05:33:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 05:33:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2022-12-14 05:33:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 128 states have (on average 1.1015625) internal successors, (141), 131 states have internal predecessors, (141), 37 states have call successors, (37), 27 states have call predecessors, (37), 27 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 05:33:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2022-12-14 05:33:27,710 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 79 [2022-12-14 05:33:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:33:27,710 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2022-12-14 05:33:27,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2022-12-14 05:33:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2022-12-14 05:33:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 05:33:27,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:33:27,711 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 05:33:27,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:33:27,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 05:33:27,911 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:33:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:33:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1528689375, now seen corresponding path program 3 times [2022-12-14 05:33:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:33:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122956323] [2022-12-14 05:33:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:33:27,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:33:27,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742262809] [2022-12-14 05:33:27,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:33:27,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:27,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:27,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:27,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:33:27,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:33:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:33:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 05:33:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 124 proven. 57 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-12-14 05:34:07,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:26,983 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse17 (div |c_ULTIMATE.start_main_~p~0#1| 2)) (.cse7 (* |c_ULTIMATE.start_main_~B~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (= (mod |c_ULTIMATE.start_main_~d~0#1| 2) 0)) (.cse35 (< |c_ULTIMATE.start_main_~d~0#1| 0)) (.cse4 (div |c_ULTIMATE.start_main_~d~0#1| 2))) (let ((.cse1 (+ .cse4 1)) (.cse3 (not .cse35)) (.cse5 (and .cse35 (not .cse0))) (.cse18 (= (mod |c_ULTIMATE.start_main_~p~0#1| 2) 0)) (.cse6 (< |c_ULTIMATE.start_main_~p~0#1| 0)) (.cse9 (not (= |c_ULTIMATE.start_main_~A~0#1| (+ .cse7 |c_ULTIMATE.start_main_~r~0#1|)))) (.cse13 (* .cse17 |c_ULTIMATE.start_main_~B~0#1|))) (and (let ((.cse2 (+ |c_ULTIMATE.start_main_~B~0#1| .cse13))) (or (and (or .cse0 (not (= .cse1 .cse2)) .cse3) (or (not (= .cse4 .cse2)) .cse5)) (not .cse6) (let ((.cse16 (+ .cse17 1))) (let ((.cse15 (+ |c_ULTIMATE.start_main_~B~0#1| (* (div .cse16 2) |c_ULTIMATE.start_main_~B~0#1|))) (.cse8 (div .cse2 2))) (let ((.cse10 (= .cse15 .cse8)) (.cse11 (<= .cse2 |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (= (mod .cse16 2) 0))) (and (or (not (<= (+ .cse7 .cse8) |c_ULTIMATE.start_main_~A~0#1|)) .cse9 .cse10 .cse11 .cse12) (or (let ((.cse14 (< .cse2 0))) (and (or (not (<= (+ .cse7 .cse8 |c_ULTIMATE.start_main_~B~0#1| .cse13) |c_ULTIMATE.start_main_~A~0#1|)) .cse10 (and .cse14 (not (= (mod .cse2 2) 0)))) (or (not .cse14) (= .cse15 (+ .cse8 1))))) (not .cse11) .cse9 .cse12))))) .cse18)) (or (and (or (not (= .cse13 .cse1)) .cse0 .cse3) (or (not (= .cse4 .cse13)) .cse5)) (and (not .cse18) .cse6) (let ((.cse31 (* (div |c_ULTIMATE.start_main_~p~0#1| 4) |c_ULTIMATE.start_main_~B~0#1|))) (let ((.cse24 (< .cse17 0)) (.cse33 (+ .cse31 |c_ULTIMATE.start_main_~B~0#1|)) (.cse25 (div .cse13 2))) (let ((.cse26 (<= .cse13 |c_ULTIMATE.start_main_~r~0#1|)) (.cse23 (= .cse25 .cse31)) (.cse20 (= (mod .cse17 2) 0)) (.cse19 (= .cse25 .cse33)) (.cse22 (not .cse24))) (and (or (let ((.cse21 (not (<= (+ .cse25 .cse7) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or .cse19 .cse20 .cse21 .cse22) (or .cse23 .cse21 .cse24))) .cse26 .cse9) (or (not .cse26) .cse9 (let ((.cse29 (= (mod .cse13 2) 0)) (.cse34 (< .cse13 0))) (let ((.cse32 (+ .cse25 1)) (.cse30 (not .cse34)) (.cse27 (and .cse34 (not .cse29))) (.cse28 (not (<= (+ .cse25 .cse7 .cse13) |c_ULTIMATE.start_main_~A~0#1|)))) (and (or (and (or .cse27 .cse23 .cse28) (or .cse29 .cse30 (= .cse31 .cse32))) .cse24) (or .cse20 (and (or (= .cse32 .cse33) .cse30) (or .cse19 .cse27 .cse28)) .cse22))))))))))))) is different from true [2022-12-14 05:36:00,187 WARN L233 SmtUtils]: Spent 13.44s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:36:51,042 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:37:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 133 proven. 29 refuted. 0 times theorem prover too weak. 204 trivial. 1 not checked. [2022-12-14 05:37:22,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:37:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122956323] [2022-12-14 05:37:22,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:37:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742262809] [2022-12-14 05:37:22,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742262809] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:37:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126811476] [2022-12-14 05:37:22,422 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:37:22,422 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:37:22,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:37:22,422 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:37:22,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:37:24,108 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:37:24,111 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:37:30,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8041#(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 05:37:30,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:37:30,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:37:30,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-12-14 05:37:30,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232195295] [2022-12-14 05:37:30,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:37:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:37:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:37:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:37:30,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1102, Unknown=5, NotChecked=70, Total=1406 [2022-12-14 05:37:30,553 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-12-14 05:38:17,200 WARN L233 SmtUtils]: Spent 42.21s on a formula simplification. DAG size of input: 127 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:38:21,775 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 05:38:23,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:38:41,998 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 114 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:39:02,943 WARN L233 SmtUtils]: Spent 13.63s on a formula simplification. DAG size of input: 107 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:39:05,048 WARN L539 Checker$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 05:39:08,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:10,913 WARN L539 Checker$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 05:39:11,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:13,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:15,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:17,869 WARN L539 Checker$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 05:39:20,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:22,283 WARN L539 Checker$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 05:39:24,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:25,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:27,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:28,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:30,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:32,911 WARN L539 Checker$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 05:39:34,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:39:39,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:42,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:43,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:46,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:48,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:52,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:53,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:55,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:39:59,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:40:02,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:40:05,087 WARN L539 Checker$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 05:40:45,176 WARN L233 SmtUtils]: Spent 35.80s on a formula simplification. DAG size of input: 128 DAG size of output: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:40:51,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:40:53,060 WARN L539 Checker$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 05:40:54,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:40:55,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:40:57,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:01,077 WARN L539 Checker$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 05:41:02,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:04,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:06,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:07,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:09,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:33,949 WARN L233 SmtUtils]: Spent 17.74s on a formula simplification. DAG size of input: 183 DAG size of output: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:41:36,118 WARN L539 Checker$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 05:41:38,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:40,122 WARN L539 Checker$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 05:41:50,419 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 97 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:41:52,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:41:55,338 WARN L539 Checker$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 05:41:56,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:42:02,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:42:03,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 05:42:51,514 WARN L233 SmtUtils]: Spent 32.22s on a formula simplification. DAG size of input: 84 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:02,094 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 114 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:04,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2022-12-14 05:43:17,086 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 95 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:43:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:17,749 INFO L93 Difference]: Finished difference Result 251 states and 288 transitions. [2022-12-14 05:43:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 05:43:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) Word has length 87 [2022-12-14 05:43:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:17,751 INFO L225 Difference]: With dead ends: 251 [2022-12-14 05:43:17,751 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 05:43:17,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 217 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 312.4s TimeCoverageRelationStatistics Valid=424, Invalid=2107, Unknown=23, NotChecked=98, Total=2652 [2022-12-14 05:43:17,752 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 90 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 155 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 113.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 113.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:17,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 246 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 594 Invalid, 22 Unknown, 103 Unchecked, 113.8s Time] [2022-12-14 05:43:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 05:43:17,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 225. [2022-12-14 05:43:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 155 states have internal predecessors, (166), 45 states have call successors, (45), 30 states have call predecessors, (45), 30 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-12-14 05:43:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 254 transitions. [2022-12-14 05:43:17,819 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 254 transitions. Word has length 87 [2022-12-14 05:43:17,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:17,819 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 254 transitions. [2022-12-14 05:43:17,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 17 states have internal predecessors, (46), 15 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2022-12-14 05:43:17,819 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 254 transitions. [2022-12-14 05:43:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 05:43:17,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:17,820 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:17,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:43:18,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:43:18,022 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1631100676, now seen corresponding path program 1 times [2022-12-14 05:43:18,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:18,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713141923] [2022-12-14 05:43:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:18,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:18,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:18,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677709344] [2022-12-14 05:43:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:18,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:18,047 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:18,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:43:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:18,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 05:43:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-12-14 05:43:18,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713141923] [2022-12-14 05:43:18,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677709344] [2022-12-14 05:43:18,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677709344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:18,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018792475] [2022-12-14 05:43:18,286 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:18,286 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:18,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:18,286 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:18,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:19,375 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:43:19,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:20,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9342#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 05:43:20,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:20,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:20,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-12-14 05:43:20,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265485687] [2022-12-14 05:43:20,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:20,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:43:20,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:43:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:43:20,417 INFO L87 Difference]: Start difference. First operand 225 states and 254 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-12-14 05:43:20,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:20,820 INFO L93 Difference]: Finished difference Result 531 states and 599 transitions. [2022-12-14 05:43:20,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 05:43:20,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 94 [2022-12-14 05:43:20,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:20,823 INFO L225 Difference]: With dead ends: 531 [2022-12-14 05:43:20,823 INFO L226 Difference]: Without dead ends: 478 [2022-12-14 05:43:20,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:43:20,824 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 119 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:20,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 246 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:43:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-12-14 05:43:20,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 406. [2022-12-14 05:43:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 267 states have (on average 1.1161048689138577) internal successors, (298), 280 states have internal predecessors, (298), 80 states have call successors, (80), 58 states have call predecessors, (80), 58 states have return successors, (75), 67 states have call predecessors, (75), 75 states have call successors, (75) [2022-12-14 05:43:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 453 transitions. [2022-12-14 05:43:20,944 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 453 transitions. Word has length 94 [2022-12-14 05:43:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:20,944 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 453 transitions. [2022-12-14 05:43:20,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-12-14 05:43:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 453 transitions. [2022-12-14 05:43:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 05:43:20,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:20,945 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:20,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 05:43:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:21,147 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:21,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1611272416, now seen corresponding path program 2 times [2022-12-14 05:43:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:21,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113488091] [2022-12-14 05:43:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:21,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:21,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4135176] [2022-12-14 05:43:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:43:21,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:21,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:21,157 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:21,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:43:21,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:43:21,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 05:43:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 113 proven. 41 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-12-14 05:43:21,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-12-14 05:43:21,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113488091] [2022-12-14 05:43:21,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:21,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4135176] [2022-12-14 05:43:21,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4135176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:21,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718207542] [2022-12-14 05:43:21,490 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:21,490 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:21,491 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:21,491 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:21,491 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:23,227 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:43:23,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:24,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11303#(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 05:43:24,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:24,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:24,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-12-14 05:43:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999608930] [2022-12-14 05:43:24,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 05:43:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 05:43:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:43:24,778 INFO L87 Difference]: Start difference. First operand 406 states and 453 transitions. Second operand has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 05:43:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:25,579 INFO L93 Difference]: Finished difference Result 422 states and 470 transitions. [2022-12-14 05:43:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:43:25,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 98 [2022-12-14 05:43:25,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:25,581 INFO L225 Difference]: With dead ends: 422 [2022-12-14 05:43:25,581 INFO L226 Difference]: Without dead ends: 410 [2022-12-14 05:43:25,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 260 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:43:25,582 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 79 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:25,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 65 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:43:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-12-14 05:43:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 321. [2022-12-14 05:43:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 212 states have (on average 1.0849056603773586) internal successors, (230), 222 states have internal predecessors, (230), 60 states have call successors, (60), 48 states have call predecessors, (60), 48 states have return successors, (58), 50 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:43:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 348 transitions. [2022-12-14 05:43:25,684 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 348 transitions. Word has length 98 [2022-12-14 05:43:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:25,684 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 348 transitions. [2022-12-14 05:43:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 05:43:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 348 transitions. [2022-12-14 05:43:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-14 05:43:25,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:25,685 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:25,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:43:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:43:25,887 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:25,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:25,888 INFO L85 PathProgramCache]: Analyzing trace with hash -417817870, now seen corresponding path program 1 times [2022-12-14 05:43:25,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:25,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123679710] [2022-12-14 05:43:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:25,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:25,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873998505] [2022-12-14 05:43:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:25,912 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:25,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:43:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:43:25,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 30 proven. 411 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 05:43:26,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-12-14 05:43:26,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123679710] [2022-12-14 05:43:26,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873998505] [2022-12-14 05:43:26,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873998505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307401744] [2022-12-14 05:43:26,158 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:26,158 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:26,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:26,158 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:26,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:28,048 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:43:28,061 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:29,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12996#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 05:43:29,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:29,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:29,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-12-14 05:43:29,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549941295] [2022-12-14 05:43:29,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:29,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:43:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:29,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:43:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-12-14 05:43:29,556 INFO L87 Difference]: Start difference. First operand 321 states and 348 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-12-14 05:43:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:29,923 INFO L93 Difference]: Finished difference Result 412 states and 452 transitions. [2022-12-14 05:43:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 05:43:29,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 100 [2022-12-14 05:43:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:29,924 INFO L225 Difference]: With dead ends: 412 [2022-12-14 05:43:29,924 INFO L226 Difference]: Without dead ends: 398 [2022-12-14 05:43:29,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 262 SyntacticMatches, 10 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:43:29,925 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:29,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 222 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:43:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-12-14 05:43:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2022-12-14 05:43:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 265 states have (on average 1.0566037735849056) internal successors, (280), 273 states have internal predecessors, (280), 72 states have call successors, (72), 57 states have call predecessors, (72), 57 states have return successors, (70), 64 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-14 05:43:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 422 transitions. [2022-12-14 05:43:30,052 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 422 transitions. Word has length 100 [2022-12-14 05:43:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:30,052 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 422 transitions. [2022-12-14 05:43:30,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 10 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-12-14 05:43:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 422 transitions. [2022-12-14 05:43:30,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 05:43:30,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:30,054 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 8, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:30,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:43:30,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:43:30,255 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2143163982, now seen corresponding path program 2 times [2022-12-14 05:43:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:30,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085523820] [2022-12-14 05:43:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:30,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528530926] [2022-12-14 05:43:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:43:30,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:30,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:30,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 05:43:30,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 05:43:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:30,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 576 proven. 33 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-12-14 05:43:30,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 112 proven. 33 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2022-12-14 05:43:30,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085523820] [2022-12-14 05:43:30,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528530926] [2022-12-14 05:43:30,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528530926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525390605] [2022-12-14 05:43:30,604 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:30,604 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:30,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:30,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:30,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:32,395 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-12-14 05:43:32,400 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:33,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15075#(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 05:43:33,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:33,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:33,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-12-14 05:43:33,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293016545] [2022-12-14 05:43:33,524 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:33,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 05:43:33,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:33,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 05:43:33,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:43:33,525 INFO L87 Difference]: Start difference. First operand 395 states and 422 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-12-14 05:43:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:33,741 INFO L93 Difference]: Finished difference Result 446 states and 477 transitions. [2022-12-14 05:43:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:43:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 152 [2022-12-14 05:43:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:33,743 INFO L225 Difference]: With dead ends: 446 [2022-12-14 05:43:33,743 INFO L226 Difference]: Without dead ends: 365 [2022-12-14 05:43:33,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 424 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:43:33,744 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:33,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 223 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:43:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-12-14 05:43:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-12-14 05:43:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 245 states have (on average 1.0571428571428572) internal successors, (259), 252 states have internal predecessors, (259), 66 states have call successors, (66), 53 states have call predecessors, (66), 53 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-12-14 05:43:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 389 transitions. [2022-12-14 05:43:33,868 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 389 transitions. Word has length 152 [2022-12-14 05:43:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:33,869 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 389 transitions. [2022-12-14 05:43:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 6 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-12-14 05:43:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 389 transitions. [2022-12-14 05:43:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 05:43:33,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:33,870 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:33,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 05:43:34,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:34,071 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1099461118, now seen corresponding path program 3 times [2022-12-14 05:43:34,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:34,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125656830] [2022-12-14 05:43:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:34,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240826127] [2022-12-14 05:43:34,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:43:34,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:34,083 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:43:34,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:43:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:43:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 408 proven. 66 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-12-14 05:43:34,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 96 proven. 66 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-12-14 05:43:34,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125656830] [2022-12-14 05:43:34,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240826127] [2022-12-14 05:43:34,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240826127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131069414] [2022-12-14 05:43:34,591 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:34,592 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:34,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:34,592 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:34,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:36,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:43:36,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:38,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17179#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 05:43:38,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:38,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-12-14 05:43:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462368485] [2022-12-14 05:43:38,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:43:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:43:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:43:38,298 INFO L87 Difference]: Start difference. First operand 365 states and 389 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-12-14 05:43:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:38,514 INFO L93 Difference]: Finished difference Result 399 states and 428 transitions. [2022-12-14 05:43:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:43:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 157 [2022-12-14 05:43:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:38,517 INFO L225 Difference]: With dead ends: 399 [2022-12-14 05:43:38,517 INFO L226 Difference]: Without dead ends: 335 [2022-12-14 05:43:38,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 436 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-12-14 05:43:38,518 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:38,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 232 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:43:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-12-14 05:43:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-12-14 05:43:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 225 states have (on average 1.0577777777777777) internal successors, (238), 231 states have internal predecessors, (238), 60 states have call successors, (60), 49 states have call predecessors, (60), 49 states have return successors, (58), 54 states have call predecessors, (58), 58 states have call successors, (58) [2022-12-14 05:43:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 356 transitions. [2022-12-14 05:43:38,627 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 356 transitions. Word has length 157 [2022-12-14 05:43:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:38,627 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 356 transitions. [2022-12-14 05:43:38,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-12-14 05:43:38,627 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 356 transitions. [2022-12-14 05:43:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-12-14 05:43:38,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:38,628 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:38,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:43:38,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:38,829 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:38,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:38,829 INFO L85 PathProgramCache]: Analyzing trace with hash 502063744, now seen corresponding path program 4 times [2022-12-14 05:43:38,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:38,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882021513] [2022-12-14 05:43:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:38,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:38,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:38,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924934700] [2022-12-14 05:43:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:43:38,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:38,840 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:38,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:43:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 05:43:38,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-12-14 05:43:39,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 60 proven. 110 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-12-14 05:43:39,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:43:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882021513] [2022-12-14 05:43:39,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 05:43:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924934700] [2022-12-14 05:43:39,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924934700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:39,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123093999] [2022-12-14 05:43:39,553 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-12-14 05:43:39,553 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:43:39,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:43:39,554 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:43:39,554 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:43:41,324 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 05:43:41,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:43:42,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19216#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 05:43:42,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:43:42,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:43:42,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-14 05:43:42,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406428643] [2022-12-14 05:43:42,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:42,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 05:43:42,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:43:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 05:43:42,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:43:42,830 INFO L87 Difference]: Start difference. First operand 335 states and 356 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 20 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2022-12-14 05:43:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:43,248 INFO L93 Difference]: Finished difference Result 363 states and 390 transitions. [2022-12-14 05:43:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:43:43,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 20 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 162 [2022-12-14 05:43:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:43,250 INFO L225 Difference]: With dead ends: 363 [2022-12-14 05:43:43,250 INFO L226 Difference]: Without dead ends: 305 [2022-12-14 05:43:43,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 441 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:43:43,251 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 11 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:43,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 547 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-12-14 05:43:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-12-14 05:43:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 205 states have (on average 1.0585365853658537) internal successors, (217), 210 states have internal predecessors, (217), 54 states have call successors, (54), 45 states have call predecessors, (54), 45 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2022-12-14 05:43:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 323 transitions. [2022-12-14 05:43:43,349 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 323 transitions. Word has length 162 [2022-12-14 05:43:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:43,350 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 323 transitions. [2022-12-14 05:43:43,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 20 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2022-12-14 05:43:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 323 transitions. [2022-12-14 05:43:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 05:43:43,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:43,351 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:43,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:43,552 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:43:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 65859380, now seen corresponding path program 5 times [2022-12-14 05:43:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:43:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98943287] [2022-12-14 05:43:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:43,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:43:43,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 05:43:43,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968993269] [2022-12-14 05:43:43,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:43:43,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:43,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:43,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:43,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:43:43,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 05:43:43,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 05:43:43,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 05:43:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 05:43:43,797 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 05:43:43,797 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 05:43:43,798 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 05:43:43,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 05:43:44,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:44,013 INFO L445 BasicCegarLoop]: Path program histogram: [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:43:44,024 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 05:43:44,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 05:43:44 BoogieIcfgContainer [2022-12-14 05:43:44,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 05:43:44,086 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 05:43:44,086 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 05:43:44,086 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 05:43:44,086 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:32:39" (3/4) ... [2022-12-14 05:43:44,088 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 05:43:44,128 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 05:43:44,128 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 05:43:44,128 INFO L158 Benchmark]: Toolchain (without parser) took 665350.66ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 72.1MB in the beginning and 80.6MB in the end (delta: -8.5MB). Peak memory consumption was 88.0MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.70ms. Allocated memory is still 125.8MB. Free memory was 71.8MB in the beginning and 61.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.86ms. Allocated memory is still 125.8MB. Free memory was 61.4MB in the beginning and 59.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: Boogie Preprocessor took 14.75ms. Allocated memory is still 125.8MB. Free memory was 59.8MB in the beginning and 58.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: RCFGBuilder took 295.55ms. Allocated memory is still 125.8MB. Free memory was 58.6MB in the beginning and 90.0MB in the end (delta: -31.4MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: TraceAbstraction took 664807.26ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 89.6MB in the beginning and 86.9MB in the end (delta: 2.6MB). Peak memory consumption was 96.8MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,129 INFO L158 Benchmark]: Witness Printer took 42.11ms. Allocated memory is still 220.2MB. Free memory was 86.9MB in the beginning and 80.6MB in the end (delta: 6.4MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 05:43:44,130 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 79.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.70ms. Allocated memory is still 125.8MB. Free memory was 71.8MB in the beginning and 61.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.86ms. Allocated memory is still 125.8MB. Free memory was 61.4MB in the beginning and 59.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.75ms. Allocated memory is still 125.8MB. Free memory was 59.8MB in the beginning and 58.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 295.55ms. Allocated memory is still 125.8MB. Free memory was 58.6MB in the beginning and 90.0MB in the end (delta: -31.4MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. * TraceAbstraction took 664807.26ms. Allocated memory was 125.8MB in the beginning and 220.2MB in the end (delta: 94.4MB). Free memory was 89.6MB in the beginning and 86.9MB in the end (delta: 2.6MB). Peak memory consumption was 96.8MB. Max. memory is 16.1GB. * Witness Printer took 42.11ms. Allocated memory is still 220.2MB. Free memory was 86.9MB in the beginning and 80.6MB in the end (delta: 6.4MB). 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: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [A=19, B=1, counter=0, d=1, p=1, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=1, d=1, p=1, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=1, d=1, p=1, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=1, d=1, p=1, q=0, r=19] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=19, B=1, counter=1, d=2, p=2, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=2, d=2, p=2, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=2, d=2, p=2, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=2, d=2, p=2, q=0, r=19] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=19, B=1, counter=2, d=4, p=4, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=3, d=4, p=4, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=3, d=4, p=4, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=3, d=4, p=4, q=0, r=19] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=19, B=1, counter=3, d=8, p=8, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=4, d=8, p=8, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=4, d=8, p=8, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=4, d=8, p=8, q=0, r=19] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=19, B=1, counter=4, d=16, p=16, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=5, counter++=4, d=16, p=16, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=5, d=16, p=16, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=5, d=16, p=16, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=5, d=16, p=16, q=0, r=19] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [A=19, B=1, counter=5, d=32, p=32, q=0, r=19] [L34] EXPR counter++ VAL [A=19, B=1, counter=6, counter++=5, d=32, p=32, q=0, r=19] [L34] COND TRUE counter++<10 [L35] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L35] RET __VERIFIER_assert(q == 0) VAL [A=19, B=1, counter=6, d=32, p=32, q=0, r=19] [L36] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L36] RET __VERIFIER_assert(r == A) VAL [A=19, B=1, counter=6, d=32, p=32, q=0, r=19] [L37] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L37] RET __VERIFIER_assert(d == B * p) VAL [A=19, B=1, counter=6, d=32, p=32, q=0, r=19] [L38] COND TRUE !(r >= d) VAL [A=19, B=1, counter=6, d=32, p=32, q=0, r=19] [L44] EXPR counter++ VAL [A=19, B=1, counter=7, counter++=6, d=32, p=32, q=0, r=19] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=19, B=1, counter=7, d=32, p=32, q=0, r=19] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=7] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=19, B=1, counter=7, d=32, p=32, q=0, r=19] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=19, B=1, counter=7, d=16, p=16, q=16, r=3] [L44] EXPR counter++ VAL [A=19, B=1, counter=8, counter++=7, d=16, p=16, q=16, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=19, B=1, counter=8, d=16, p=16, q=16, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=8] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=19, B=1, counter=8, d=16, p=16, q=16, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) VAL [A=19, B=1, counter=8, d=8, p=8, q=16, r=3] [L44] EXPR counter++ VAL [A=19, B=1, counter=9, counter++=8, d=8, p=8, q=16, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=19, B=1, counter=9, d=8, p=8, q=16, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=9] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=19, B=1, counter=9, d=8, p=8, q=16, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND FALSE !(r >= d) VAL [A=19, B=1, counter=9, d=4, p=4, q=16, r=3] [L44] EXPR counter++ VAL [A=19, B=1, counter=10, counter++=9, d=4, p=4, q=16, r=3] [L44] COND TRUE counter++<10 [L45] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L45] RET __VERIFIER_assert(A == q*B + r) VAL [A=19, B=1, counter=10, d=4, p=4, q=16, r=3] [L46] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, counter=10] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L46] RET __VERIFIER_assert(d == B*p) VAL [A=19, B=1, counter=10, d=4, p=4, q=16, r=3] [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p VAL [A=19, B=1, counter=10, d=2, p=2, q=18, r=1] [L44] EXPR counter++ VAL [A=19, B=1, counter=11, counter++=10, d=2, p=2, q=18, r=1] [L44] COND FALSE !(counter++<10) [L58] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, counter=11] [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L17] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 664.7s, OverallIterations: 22, TraceHistogramMax: 27, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 368.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 756 SdHoareTripleChecker+Valid, 124.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 692 mSDsluCounter, 3242 SdHoareTripleChecker+Invalid, 124.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 103 IncrementalHoareTripleChecker+Unchecked, 2424 mSDsCounter, 540 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4071 IncrementalHoareTripleChecker+Invalid, 4739 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 540 mSolverCounterUnsat, 818 mSDtfsCounter, 4071 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3874 GetRequests, 3323 SyntacticMatches, 99 SemanticMatches, 452 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 341.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=406occurred in iteration=16, InterpolantAutomatonStates: 213, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 21 MinimizatonAttempts, 245 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 240.7s InterpolantComputationTime, 1542 NumberOfCodeBlocks, 1457 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2569 ConstructedInterpolants, 8 QuantifiedInterpolants, 17903 SizeOfPredicates, 60 NumberOfNonLiveVariables, 3578 ConjunctsInSsa, 372 ConjunctsInUnsatCore, 37 InterpolantComputations, 5 PerfectInterpolantSequences, 11775/13424 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: 0.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 29, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 23, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 17, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 50, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 72, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 21, DOMAIN_JOIN_TIME: 0.2s, 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: 29, 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: 10, 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: 231, DAG_COMPRESSION_RETAINED_NODES: 80, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 05:43:44,337 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-12-14 05:43:44,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94e2bc33-8447-467c-9d36-165aa436dec0/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