./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW --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 d2bc2a3f53718ecf47344b6d9b2d76a5698712f748ff03cd831a90a334f72c9d --- 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-4e7fbc6 [2022-11-23 15:01:58,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:01:58,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:01:58,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:01:58,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:01:58,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:01:58,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:01:58,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:01:58,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:01:58,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:01:58,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:01:58,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:01:58,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:01:58,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:01:58,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:01:58,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:01:58,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:01:58,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:01:58,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:01:58,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:01:58,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:01:58,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:01:58,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:01:58,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:01:58,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:01:58,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:01:58,517 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:01:58,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:01:58,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:01:58,523 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:01:58,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:01:58,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:01:58,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:01:58,528 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:01:58,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:01:58,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:01:58,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:01:58,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:01:58,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:01:58,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:01:58,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:01:58,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:01:58,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:01:58,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:01:58,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:01:58,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:01:58,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:01:58,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:01:58,577 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:01:58,578 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:01:58,578 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:01:58,578 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:01:58,579 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:01:58,579 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:01:58,580 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:01:58,580 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:01:58,580 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:01:58,580 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:01:58,580 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:01:58,581 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:01:58,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:01:58,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:01:58,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:01:58,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:01:58,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:01:58,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:01:58,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:01:58,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:01:58,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:01:58,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:01:58,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:01:58,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:01:58,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:01:58,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:01:58,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:01:58,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:01:58,585 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:01:58,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:01:58,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:01:58,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:01:58,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:01:58,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:01:58,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:01:58,587 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_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2bc2a3f53718ecf47344b6d9b2d76a5698712f748ff03cd831a90a334f72c9d [2022-11-23 15:01:58,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:01:58,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:01:58,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:01:58,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:01:58,990 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:01:58,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2022-11-23 15:02:02,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:02:02,192 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:02:02,193 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c [2022-11-23 15:02:02,200 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/data/6d65adcb7/05ed9ce4bedc4a78a18d8a4edb0e26b1/FLAG9778445b0 [2022-11-23 15:02:02,220 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/data/6d65adcb7/05ed9ce4bedc4a78a18d8a4edb0e26b1 [2022-11-23 15:02:02,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:02:02,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:02:02,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:02,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:02:02,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:02:02,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680082c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02, skipping insertion in model container [2022-11-23 15:02:02,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:02:02,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:02:02,450 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_e47af486-e540-4c9d-a29c-7ab23ec0d6db/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2022-11-23 15:02:02,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:02,471 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:02:02,483 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_e47af486-e540-4c9d-a29c-7ab23ec0d6db/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound2.c[537,550] [2022-11-23 15:02:02,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:02:02,501 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:02:02,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02 WrapperNode [2022-11-23 15:02:02,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:02:02,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:02,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:02:02,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:02:02,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,531 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-23 15:02:02,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:02:02,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:02:02,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:02:02,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:02:02,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,552 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:02:02,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:02:02,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:02:02,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:02:02,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (1/1) ... [2022-11-23 15:02:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:02:02,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:02,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:02:02,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:02:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:02:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:02:02,643 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:02:02,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:02:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:02:02,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:02:02,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:02:02,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:02:02,722 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:02:02,725 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:02:02,856 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:02:02,958 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:02:02,959 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:02:02,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:02 BoogieIcfgContainer [2022-11-23 15:02:02,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:02:02,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:02:02,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:02:02,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:02:02,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:02:02" (1/3) ... [2022-11-23 15:02:02,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179e46cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:02, skipping insertion in model container [2022-11-23 15:02:02,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:02" (2/3) ... [2022-11-23 15:02:02,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179e46cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:02, skipping insertion in model container [2022-11-23 15:02:02,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:02" (3/3) ... [2022-11-23 15:02:02,982 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound2.c [2022-11-23 15:02:03,002 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:02:03,002 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:02:03,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:02:03,059 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@35c66eb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:02:03,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:02:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:02:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 15:02:03,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:03,073 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:03,074 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:03,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:03,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1772938727, now seen corresponding path program 1 times [2022-11-23 15:02:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:03,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627006834] [2022-11-23 15:02:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:03,195 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:02:03,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978389858] [2022-11-23 15:02:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:03,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:03,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:03,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:03,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:02:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:02:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:02:03,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:02:03,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:03,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627006834] [2022-11-23 15:02:03,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:02:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978389858] [2022-11-23 15:02:03,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978389858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:03,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:03,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:02:03,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322434235] [2022-11-23 15:02:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:03,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:02:03,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:02:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:02:03,515 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:02:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:03,633 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-23 15:02:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:02:03,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 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 17 [2022-11-23 15:02:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:03,643 INFO L225 Difference]: With dead ends: 42 [2022-11-23 15:02:03,645 INFO L226 Difference]: Without dead ends: 26 [2022-11-23 15:02:03,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:02:03,656 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:03,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:02:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-23 15:02:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-11-23 15:02:03,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:02:03,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-23 15:02:03,714 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-11-23 15:02:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:03,716 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-23 15:02:03,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:02:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-23 15:02:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 15:02:03,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:03,719 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:03,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:02:03,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:03,928 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:03,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1457957052, now seen corresponding path program 1 times [2022-11-23 15:02:03,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:03,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274142704] [2022-11-23 15:02:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:03,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:03,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:02:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439987253] [2022-11-23 15:02:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:03,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:03,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:03,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:02:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:02:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:04,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:02:04,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274142704] [2022-11-23 15:02:04,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:02:04,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439987253] [2022-11-23 15:02:04,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439987253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:02:04,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:02:04,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:02:04,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431910452] [2022-11-23 15:02:04,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:04,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:02:04,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:04,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:02:04,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:02:04,077 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 15:02:04,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:04,192 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-11-23 15:02:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:02:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2022-11-23 15:02:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:04,195 INFO L225 Difference]: With dead ends: 32 [2022-11-23 15:02:04,195 INFO L226 Difference]: Without dead ends: 25 [2022-11-23 15:02:04,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:02:04,199 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:04,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:02:04,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-23 15:02:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-23 15:02:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:02:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-23 15:02:04,218 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2022-11-23 15:02:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:04,218 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-23 15:02:04,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 15:02:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-23 15:02:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 15:02:04,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:04,223 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:04,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:04,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:04,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -489488164, now seen corresponding path program 1 times [2022-11-23 15:02:04,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:04,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803955224] [2022-11-23 15:02:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:04,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:02:04,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462634016] [2022-11-23 15:02:04,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:04,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:04,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:04,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:02:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 15:02:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:05,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:02:11,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803955224] [2022-11-23 15:02:11,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:02:11,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462634016] [2022-11-23 15:02:11,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462634016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:11,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [897783943] [2022-11-23 15:02:11,665 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 15:02:11,666 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:11,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:11,675 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:11,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:12,503 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 43 for LOIs [2022-11-23 15:02:12,635 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-23 15:02:12,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:16,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '483#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:02:16,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:16,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:02:16,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2022-11-23 15:02:16,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477645263] [2022-11-23 15:02:16,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:02:16,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:02:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-11-23 15:02:16,709 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 15:02:22,397 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 48 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:02:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:24,171 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-23 15:02:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 15:02:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 24 [2022-11-23 15:02:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:24,174 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:02:24,174 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 15:02:24,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 15:02:24,178 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:24,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 48 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 15:02:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 15:02:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-11-23 15:02:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 15:02:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-23 15:02:24,190 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 24 [2022-11-23 15:02:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:24,191 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-23 15:02:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 13 states have internal predecessors, (23), 8 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 15:02:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-23 15:02:24,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:02:24,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:24,192 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:24,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:24,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:24,405 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash 750858559, now seen corresponding path program 1 times [2022-11-23 15:02:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:24,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680089928] [2022-11-23 15:02:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:24,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:02:24,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252036344] [2022-11-23 15:02:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:24,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:24,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:24,430 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:24,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:02:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:02:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:02:24,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:02:24,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:02:24,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680089928] [2022-11-23 15:02:24,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:02:24,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252036344] [2022-11-23 15:02:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252036344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:02:24,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [736951089] [2022-11-23 15:02:24,687 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-23 15:02:24,687 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:02:24,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:02:24,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:02:24,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:02:25,315 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 15:02:25,319 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2022-11-23 15:02:25,321 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:02:26,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '803#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:02:26,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:02:26,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:02:26,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-23 15:02:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598242457] [2022-11-23 15:02:26,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:02:26,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 15:02:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 15:02:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:02:26,164 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:02:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:26,341 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-23 15:02:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:02:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-11-23 15:02:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:26,343 INFO L225 Difference]: With dead ends: 43 [2022-11-23 15:02:26,343 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 15:02:26,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-11-23 15:02:26,345 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:26,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 71 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:02:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 15:02:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-23 15:02:26,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 15:02:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-23 15:02:26,356 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2022-11-23 15:02:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:26,356 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-23 15:02:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:02:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-23 15:02:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:02:26,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:02:26,358 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:02:26,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 15:02:26,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:26,564 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:02:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:02:26,564 INFO L85 PathProgramCache]: Analyzing trace with hash -997597351, now seen corresponding path program 2 times [2022-11-23 15:02:26,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:02:26,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390094464] [2022-11-23 15:02:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:02:26,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:02:26,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:02:26,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644079084] [2022-11-23 15:02:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:02:26,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:26,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:02:26,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:02:26,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:02:26,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 15:02:26,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:02:26,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 15:02:26,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:02:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-23 15:02:26,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:02:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-23 15:02:28,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:02:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390094464] [2022-11-23 15:02:28,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:02:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644079084] [2022-11-23 15:02:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644079084] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:02:28,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:02:28,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2022-11-23 15:02:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148794947] [2022-11-23 15:02:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:02:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:02:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:02:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:02:28,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:02:28,075 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 15:02:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:02:28,789 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-11-23 15:02:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:02:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 45 [2022-11-23 15:02:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:02:28,790 INFO L225 Difference]: With dead ends: 40 [2022-11-23 15:02:28,790 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:02:28,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 15:02:28,792 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:02:28,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:02:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:02:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:02:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:02:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:02:28,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2022-11-23 15:02:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:02:28,794 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:02:28,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 15:02:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:02:28,794 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:02:28,797 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:02:28,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:02:29,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:02:29,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 15:02:29,819 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 15:02:29,820 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-11-23 15:02:29,820 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~b~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) (<= |ULTIMATE.start_main_~b~0#1| 2) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-11-23 15:02:29,820 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-11-23 15:02:29,820 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-23 15:02:29,820 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-23 15:02:29,820 INFO L895 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~a~0#1| 2)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 2)) (.cse2 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse3 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and .cse0 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (let ((.cse5 (* 2 |ULTIMATE.start_main_~y~0#1|))) (and .cse0 .cse1 .cse2 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse4 (<= 0 (+ .cse5 1)) (<= .cse5 0))) (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse3 .cse4 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))))) [2022-11-23 15:02:29,821 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|))) (and (<= |ULTIMATE.start_main_~a~0#1| 2) (<= |ULTIMATE.start_main_~b~0#1| 2) (<= 1 |ULTIMATE.start_main_~b~0#1|) (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) .cse0) (= |ULTIMATE.start_main_~z~0#1| .cse0) (<= 0 |ULTIMATE.start_main_~a~0#1|))) [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-11-23 15:02:29,821 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= |ULTIMATE.start_main_~a~0#1| 2)) (.cse1 (<= |ULTIMATE.start_main_~b~0#1| 2)) (.cse2 (<= 1 |ULTIMATE.start_main_~b~0#1|)) (.cse3 (= |ULTIMATE.start_main_~z~0#1| 0)) (.cse4 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and .cse0 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|) .cse1 .cse2 .cse3 .cse4 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (let ((.cse5 (* 2 |ULTIMATE.start_main_~y~0#1|))) (and .cse0 .cse1 .cse2 (= (+ |ULTIMATE.start_main_~z~0#1| (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~b~0#1|)) .cse4 (<= 0 (+ .cse5 1)) (<= .cse5 0))) (and (= |ULTIMATE.start_main_~y~0#1| (div |ULTIMATE.start_main_~b~0#1| 2)) .cse0 .cse1 .cse2 (= |ULTIMATE.start_main_~x~0#1| (* 2 |ULTIMATE.start_main_~a~0#1|)) .cse3 .cse4 (not (= (mod |ULTIMATE.start_main_~b~0#1| 2) 1))))) [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-11-23 15:02:29,821 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-11-23 15:02:29,821 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-11-23 15:02:29,821 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-11-23 15:02:29,822 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-11-23 15:02:29,822 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-11-23 15:02:29,822 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-11-23 15:02:29,825 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-11-23 15:02:29,827 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:02:29,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:02:29 BoogieIcfgContainer [2022-11-23 15:02:29,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:02:29,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:02:29,846 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:02:29,846 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:02:29,846 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:02" (3/4) ... [2022-11-23 15:02:29,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 15:02:29,855 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-23 15:02:29,855 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-23 15:02:29,859 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-11-23 15:02:29,859 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-23 15:02:29,859 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 15:02:29,859 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 15:02:29,888 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:02:29,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:02:29,888 INFO L158 Benchmark]: Toolchain (without parser) took 27663.84ms. Allocated memory was 174.1MB in the beginning and 213.9MB in the end (delta: 39.8MB). Free memory was 138.6MB in the beginning and 143.7MB in the end (delta: -5.1MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,889 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:02:29,889 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.10ms. Allocated memory is still 174.1MB. Free memory was 138.6MB in the beginning and 138.2MB in the end (delta: 436.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,889 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.50ms. Allocated memory is still 174.1MB. Free memory was 138.2MB in the beginning and 136.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,890 INFO L158 Benchmark]: Boogie Preprocessor took 21.28ms. Allocated memory is still 174.1MB. Free memory was 136.8MB in the beginning and 135.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,890 INFO L158 Benchmark]: RCFGBuilder took 407.00ms. Allocated memory is still 174.1MB. Free memory was 135.2MB in the beginning and 122.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,891 INFO L158 Benchmark]: TraceAbstraction took 26881.28ms. Allocated memory was 174.1MB in the beginning and 213.9MB in the end (delta: 39.8MB). Free memory was 122.2MB in the beginning and 146.8MB in the end (delta: -24.7MB). Peak memory consumption was 105.6MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,891 INFO L158 Benchmark]: Witness Printer took 42.35ms. Allocated memory is still 213.9MB. Free memory was 146.8MB in the beginning and 143.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:02:29,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 130.0MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.10ms. Allocated memory is still 174.1MB. Free memory was 138.6MB in the beginning and 138.2MB in the end (delta: 436.5kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.50ms. Allocated memory is still 174.1MB. Free memory was 138.2MB in the beginning and 136.8MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.28ms. Allocated memory is still 174.1MB. Free memory was 136.8MB in the beginning and 135.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 407.00ms. Allocated memory is still 174.1MB. Free memory was 135.2MB in the beginning and 122.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 26881.28ms. Allocated memory was 174.1MB in the beginning and 213.9MB in the end (delta: 39.8MB). Free memory was 122.2MB in the beginning and 146.8MB in the end (delta: -24.7MB). Peak memory consumption was 105.6MB. Max. memory is 16.1GB. * Witness Printer took 42.35ms. Allocated memory is still 213.9MB. Free memory was 146.8MB in the beginning and 143.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.8s, OverallIterations: 5, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 109 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 262 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 188 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 390 IncrementalHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 74 mSDtfsCounter, 390 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 13.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=3, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 19 PreInvPairs, 28 NumberOfFragments, 229 HoareAnnotationTreeSize, 19 FomulaSimplifications, 100 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 1200 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 230 ConstructedInterpolants, 1 QuantifiedInterpolants, 1522 SizeOfPredicates, 24 NumberOfNonLiveVariables, 473 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 179/196 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((a <= 2 && b == y) && b <= 2) && 1 <= b) && z == 0) && 0 <= a) && a == x) || ((((((a <= 2 && b <= 2) && 1 <= b) && z + x * y == a * b) && 0 <= a) && 0 <= 2 * y + 1) && 2 * y <= 0)) || (((((((y == b / 2 && a <= 2) && b <= 2) && 1 <= b) && x == 2 * a) && z == 0) && 0 <= a) && !(b % 2 == 1)) RESULT: Ultimate proved your program to be correct! [2022-11-23 15:02:29,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e47af486-e540-4c9d-a29c-7ab23ec0d6db/bin/utaipan-Q6hlc19bkW/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 Result: TRUE