./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur --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 c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 --- 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-38b53e6 [2022-11-26 01:07:49,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:07:49,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:07:49,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:07:49,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:07:49,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:07:49,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:07:49,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:07:49,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:07:49,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:07:49,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:07:49,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:07:49,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:07:49,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:07:49,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:07:49,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:07:49,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:07:49,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:07:49,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:07:49,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:07:49,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:07:49,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:07:49,584 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:07:49,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:07:49,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:07:49,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:07:49,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:07:49,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:07:49,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:07:49,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:07:49,590 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:07:49,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:07:49,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:07:49,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:07:49,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:07:49,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:07:49,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:07:49,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:07:49,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:07:49,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:07:49,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:07:49,603 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 01:07:49,630 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:07:49,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:07:49,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:07:49,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:07:49,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:07:49,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:07:49,632 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:07:49,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:07:49,633 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:07:49,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:07:49,633 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:07:49,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:07:49,634 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:07:49,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:07:49,634 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:07:49,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:07:49,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:07:49,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:07:49,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:07:49,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 01:07:49,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:07:49,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 01:07:49,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:07:49,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:07:49,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:07:49,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:07:49,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 01:07:49,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:07:49,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:07:49,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:07:49,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:07:49,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:07:49,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:07:49,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:07:49,639 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:07:49,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:07:49,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:07:49,639 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:07:49,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:07:49,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:07:49,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:07:49,640 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_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 [2022-11-26 01:07:49,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:07:49,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:07:49,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:07:49,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:07:49,975 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:07:49,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/float-benchs/zonotope_3.c [2022-11-26 01:07:53,038 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:07:53,263 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:07:53,264 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/sv-benchmarks/c/float-benchs/zonotope_3.c [2022-11-26 01:07:53,272 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/data/3540d58ed/d355099b921b4899a194185c1fe934ca/FLAG7f2ea0043 [2022-11-26 01:07:53,294 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/data/3540d58ed/d355099b921b4899a194185c1fe934ca [2022-11-26 01:07:53,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:07:53,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:07:53,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:07:53,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:07:53,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:07:53,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@295100ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53, skipping insertion in model container [2022-11-26 01:07:53,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:07:53,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:07:53,541 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_902b7951-f2cf-4291-9b08-c794a7395b8b/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2022-11-26 01:07:53,564 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:07:53,575 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:07:53,589 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_902b7951-f2cf-4291-9b08-c794a7395b8b/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2022-11-26 01:07:53,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:07:53,616 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:07:53,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53 WrapperNode [2022-11-26 01:07:53,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:07:53,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:07:53,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:07:53,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:07:53,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,659 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-11-26 01:07:53,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:07:53,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:07:53,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:07:53,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:07:53,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,699 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:07:53,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:07:53,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:07:53,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:07:53,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (1/1) ... [2022-11-26 01:07:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:07:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:53,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:07:53,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:07:53,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:07:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-26 01:07:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-26 01:07:53,791 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-11-26 01:07:53,791 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2022-11-26 01:07:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:07:53,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:07:53,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:07:53,873 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:07:53,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:07:54,032 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:07:54,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:07:54,068 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 01:07:54,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:07:54 BoogieIcfgContainer [2022-11-26 01:07:54,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:07:54,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:07:54,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:07:54,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:07:54,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:07:53" (1/3) ... [2022-11-26 01:07:54,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9b2ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:07:54, skipping insertion in model container [2022-11-26 01:07:54,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:07:53" (2/3) ... [2022-11-26 01:07:54,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9b2ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:07:54, skipping insertion in model container [2022-11-26 01:07:54,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:07:54" (3/3) ... [2022-11-26 01:07:54,081 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2022-11-26 01:07:54,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:07:54,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:07:54,167 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:07:54,174 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;@5629de16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:07:54,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:07:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 01:07:54,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-26 01:07:54,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:54,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:54,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash -377860736, now seen corresponding path program 1 times [2022-11-26 01:07:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:54,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404222154] [2022-11-26 01:07:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 01:07:54,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:54,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404222154] [2022-11-26 01:07:54,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404222154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:07:54,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:07:54,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 01:07:54,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820397573] [2022-11-26 01:07:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:07:54,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:07:54,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:07:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:07:54,637 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:07:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:54,717 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2022-11-26 01:07:54,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:07:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-26 01:07:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:54,727 INFO L225 Difference]: With dead ends: 41 [2022-11-26 01:07:54,729 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 01:07:54,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 01:07:54,738 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:07:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 01:07:54,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-26 01:07:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-26 01:07:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-26 01:07:54,786 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2022-11-26 01:07:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:54,787 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-26 01:07:54,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 01:07:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-26 01:07:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 01:07:54,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:54,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:54,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 01:07:54,792 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:54,795 INFO L85 PathProgramCache]: Analyzing trace with hash 647802699, now seen corresponding path program 1 times [2022-11-26 01:07:54,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:54,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743588972] [2022-11-26 01:07:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:54,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:07:54,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:54,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743588972] [2022-11-26 01:07:54,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743588972] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:54,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177566182] [2022-11-26 01:07:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:54,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:54,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:54,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:07:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:55,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 01:07:55,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:07:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:07:55,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177566182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:55,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1038767455] [2022-11-26 01:07:55,212 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:07:55,212 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:55,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:55,221 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:55,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:07:56,932 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:07:56,934 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:07:56,935 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:07:57,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '353#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:07:57,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:57,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:57,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-26 01:07:57,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172352002] [2022-11-26 01:07:57,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:07:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:07:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:07:57,251 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 01:07:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:57,336 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2022-11-26 01:07:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:07:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 37 [2022-11-26 01:07:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:57,338 INFO L225 Difference]: With dead ends: 56 [2022-11-26 01:07:57,338 INFO L226 Difference]: Without dead ends: 53 [2022-11-26 01:07:57,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:07:57,340 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:57,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 117 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:07:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-26 01:07:57,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-26 01:07:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-26 01:07:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2022-11-26 01:07:57,351 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 37 [2022-11-26 01:07:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:57,351 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2022-11-26 01:07:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 01:07:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2022-11-26 01:07:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 01:07:57,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:57,354 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:57,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:07:57,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:57,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:07:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:07:57,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1813992512, now seen corresponding path program 2 times [2022-11-26 01:07:57,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:07:57,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326293043] [2022-11-26 01:07:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:07:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:07:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:07:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:07:57,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:07:57,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326293043] [2022-11-26 01:07:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326293043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:07:57,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86905972] [2022-11-26 01:07:57,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:07:57,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:07:57,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:07:57,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:07:57,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:07:57,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-26 01:07:57,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:07:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 01:07:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:07:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:07:58,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:07:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-26 01:07:58,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86905972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:07:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550123369] [2022-11-26 01:07:58,215 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:07:58,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:07:58,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:07:58,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:07:58,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:07:59,334 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:07:59,336 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:07:59,337 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:07:59,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1059#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:07:59,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:07:59,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:07:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-26 01:07:59,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737836758] [2022-11-26 01:07:59,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:07:59,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:07:59,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:07:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:07:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:07:59,642 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-26 01:07:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:07:59,808 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2022-11-26 01:07:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:07:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 88 [2022-11-26 01:07:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:07:59,810 INFO L225 Difference]: With dead ends: 110 [2022-11-26 01:07:59,810 INFO L226 Difference]: Without dead ends: 107 [2022-11-26 01:07:59,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:07:59,812 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:07:59,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 142 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:07:59,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-26 01:07:59,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-26 01:07:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-26 01:07:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 149 transitions. [2022-11-26 01:07:59,829 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 149 transitions. Word has length 88 [2022-11-26 01:07:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:07:59,830 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 149 transitions. [2022-11-26 01:07:59,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-26 01:07:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 149 transitions. [2022-11-26 01:07:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-26 01:07:59,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:07:59,835 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:07:59,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:00,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 01:08:00,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:00,041 INFO L85 PathProgramCache]: Analyzing trace with hash 853412448, now seen corresponding path program 3 times [2022-11-26 01:08:00,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:00,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520644653] [2022-11-26 01:08:00,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:00,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-11-26 01:08:00,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520644653] [2022-11-26 01:08:00,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520644653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051661999] [2022-11-26 01:08:00,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:08:00,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:00,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:00,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:08:00,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:08:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:08:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:08:00,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-11-26 01:08:01,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-11-26 01:08:01,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051661999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:01,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716616448] [2022-11-26 01:08:01,522 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:08:01,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:01,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:01,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:01,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:02,506 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:08:02,507 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:08:02,508 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:08:02,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2557#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:08:02,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:08:02,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:02,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-26 01:08:02,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876235415] [2022-11-26 01:08:02,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:08:02,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:08:02,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:08:02,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:08:02,820 INFO L87 Difference]: Start difference. First operand 107 states and 149 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2022-11-26 01:08:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:03,164 INFO L93 Difference]: Finished difference Result 218 states and 319 transitions. [2022-11-26 01:08:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:08:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) Word has length 190 [2022-11-26 01:08:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:03,168 INFO L225 Difference]: With dead ends: 218 [2022-11-26 01:08:03,168 INFO L226 Difference]: Without dead ends: 215 [2022-11-26 01:08:03,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:08:03,170 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 8 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:03,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 260 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:08:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-26 01:08:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-11-26 01:08:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 92 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-26 01:08:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 305 transitions. [2022-11-26 01:08:03,195 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 305 transitions. Word has length 190 [2022-11-26 01:08:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:03,196 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 305 transitions. [2022-11-26 01:08:03,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2022-11-26 01:08:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 305 transitions. [2022-11-26 01:08:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-26 01:08:03,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:03,204 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:03,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:03,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:03,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:03,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1979559584, now seen corresponding path program 4 times [2022-11-26 01:08:03,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426922064] [2022-11-26 01:08:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:03,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-11-26 01:08:05,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:05,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426922064] [2022-11-26 01:08:05,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426922064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:05,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938303940] [2022-11-26 01:08:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:08:05,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:05,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:05,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:05,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:08:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:05,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:08:05,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-11-26 01:08:05,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:06,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2022-11-26 01:08:06,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938303940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:06,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749567881] [2022-11-26 01:08:06,986 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:08:06,986 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:06,987 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:06,987 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:06,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:07,940 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:08:07,941 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:08:07,942 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:08:08,302 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:08:08,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:08:08,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:08,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-26 01:08:08,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116597929] [2022-11-26 01:08:08,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:08:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-26 01:08:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-26 01:08:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 01:08:08,310 INFO L87 Difference]: Start difference. First operand 215 states and 305 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2022-11-26 01:08:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:09,022 INFO L93 Difference]: Finished difference Result 434 states and 643 transitions. [2022-11-26 01:08:09,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-26 01:08:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) Word has length 394 [2022-11-26 01:08:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:09,028 INFO L225 Difference]: With dead ends: 434 [2022-11-26 01:08:09,028 INFO L226 Difference]: Without dead ends: 431 [2022-11-26 01:08:09,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 01:08:09,030 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 8 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:09,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 391 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:08:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-26 01:08:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-11-26 01:08:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 188 states have call successors, (188), 2 states have call predecessors, (188), 2 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-26 01:08:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 617 transitions. [2022-11-26 01:08:09,074 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 617 transitions. Word has length 394 [2022-11-26 01:08:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:09,075 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 617 transitions. [2022-11-26 01:08:09,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2022-11-26 01:08:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 617 transitions. [2022-11-26 01:08:09,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2022-11-26 01:08:09,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:09,104 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:09,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:09,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:09,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1253955360, now seen corresponding path program 5 times [2022-11-26 01:08:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:09,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881407030] [2022-11-26 01:08:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:09,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-11-26 01:08:14,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:14,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881407030] [2022-11-26 01:08:14,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881407030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:14,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123293939] [2022-11-26 01:08:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:08:14,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:14,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:14,311 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:14,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:08:15,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2022-11-26 01:08:15,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:08:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 2263 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-26 01:08:15,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-11-26 01:08:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2022-11-26 01:08:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123293939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530726040] [2022-11-26 01:08:19,994 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:08:19,995 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:19,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:19,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:19,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:20,918 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:08:20,919 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:08:20,920 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:08:21,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11889#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:08:21,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:08:21,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:21,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-11-26 01:08:21,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738671224] [2022-11-26 01:08:21,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:08:21,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-26 01:08:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-26 01:08:21,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4685, Invalid=6235, Unknown=0, NotChecked=0, Total=10920 [2022-11-26 01:08:21,422 INFO L87 Difference]: Start difference. First operand 431 states and 617 transitions. Second operand has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) [2022-11-26 01:08:23,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:23,098 INFO L93 Difference]: Finished difference Result 866 states and 1291 transitions. [2022-11-26 01:08:23,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-26 01:08:23,100 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) Word has length 802 [2022-11-26 01:08:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:23,108 INFO L225 Difference]: With dead ends: 866 [2022-11-26 01:08:23,108 INFO L226 Difference]: Without dead ends: 863 [2022-11-26 01:08:23,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2453 GetRequests, 2350 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4685, Invalid=6235, Unknown=0, NotChecked=0, Total=10920 [2022-11-26 01:08:23,113 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 8 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:23,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 761 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-26 01:08:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-26 01:08:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 863. [2022-11-26 01:08:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 480 states have (on average 1.0020833333333334) internal successors, (481), 480 states have internal predecessors, (481), 380 states have call successors, (380), 2 states have call predecessors, (380), 2 states have return successors, (380), 380 states have call predecessors, (380), 380 states have call successors, (380) [2022-11-26 01:08:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1241 transitions. [2022-11-26 01:08:23,210 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1241 transitions. Word has length 802 [2022-11-26 01:08:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:23,214 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1241 transitions. [2022-11-26 01:08:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.927835051546392) internal successors, (478), 97 states have internal predecessors, (478), 94 states have call successors, (376), 1 states have call predecessors, (376), 1 states have return successors, (376), 94 states have call predecessors, (376), 94 states have call successors, (376) [2022-11-26 01:08:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1241 transitions. [2022-11-26 01:08:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2022-11-26 01:08:23,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:23,291 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:08:23,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:23,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:23,492 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1644275744, now seen corresponding path program 6 times [2022-11-26 01:08:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124011929] [2022-11-26 01:08:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-11-26 01:08:42,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124011929] [2022-11-26 01:08:42,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124011929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:42,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115053091] [2022-11-26 01:08:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:08:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:42,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:42,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:08:43,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:08:43,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:08:43,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 4587 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-26 01:08:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-11-26 01:08:45,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 111253 backedges. 0 proven. 39433 refuted. 0 times theorem prover too weak. 71820 trivial. 0 not checked. [2022-11-26 01:08:57,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115053091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:08:57,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114101533] [2022-11-26 01:08:57,787 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:08:57,787 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:08:57,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:08:57,788 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:08:57,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:08:58,677 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:08:58,678 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:08:58,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:08:59,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24475#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:08:59,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:08:59,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:08:59,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2022-11-26 01:08:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289716313] [2022-11-26 01:08:59,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:08:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-26 01:08:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-26 01:08:59,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18557, Invalid=21643, Unknown=0, NotChecked=0, Total=40200 [2022-11-26 01:08:59,416 INFO L87 Difference]: Start difference. First operand 863 states and 1241 transitions. Second operand has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) [2022-11-26 01:09:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:04,542 INFO L93 Difference]: Finished difference Result 1730 states and 2587 transitions. [2022-11-26 01:09:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-26 01:09:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) Word has length 1618 [2022-11-26 01:09:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:04,554 INFO L225 Difference]: With dead ends: 1730 [2022-11-26 01:09:04,554 INFO L226 Difference]: Without dead ends: 1727 [2022-11-26 01:09:04,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4949 GetRequests, 4750 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=18557, Invalid=21643, Unknown=0, NotChecked=0, Total=40200 [2022-11-26 01:09:04,559 INFO L413 NwaCegarLoop]: 781 mSDtfsCounter, 8 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 4179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:04,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1487 Invalid, 4181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4179 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-26 01:09:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-11-26 01:09:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1727. [2022-11-26 01:09:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 960 states have (on average 1.0010416666666666) internal successors, (961), 960 states have internal predecessors, (961), 764 states have call successors, (764), 2 states have call predecessors, (764), 2 states have return successors, (764), 764 states have call predecessors, (764), 764 states have call successors, (764) [2022-11-26 01:09:04,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2489 transitions. [2022-11-26 01:09:04,659 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2489 transitions. Word has length 1618 [2022-11-26 01:09:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:04,663 INFO L495 AbstractCegarLoop]: Abstraction has 1727 states and 2489 transitions. [2022-11-26 01:09:04,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.963730569948186) internal successors, (958), 193 states have internal predecessors, (958), 190 states have call successors, (760), 1 states have call predecessors, (760), 1 states have return successors, (760), 190 states have call predecessors, (760), 190 states have call successors, (760) [2022-11-26 01:09:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2489 transitions. [2022-11-26 01:09:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3251 [2022-11-26 01:09:04,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:04,741 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:04,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 01:09:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:04,942 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 630671904, now seen corresponding path program 7 times [2022-11-26 01:09:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864293035] [2022-11-26 01:09:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:04,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-11-26 01:11:04,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864293035] [2022-11-26 01:11:04,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864293035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:04,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831734864] [2022-11-26 01:11:04,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:11:04,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:04,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:04,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:11:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 9195 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-26 01:11:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-11-26 01:11:08,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 452869 backedges. 0 proven. 161785 refuted. 0 times theorem prover too weak. 291084 trivial. 0 not checked. [2022-11-26 01:11:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831734864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:11:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572150393] [2022-11-26 01:11:56,377 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-26 01:11:56,378 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:56,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:56,379 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:56,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:57,221 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 8 for LOIs [2022-11-26 01:11:57,222 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 8 for LOIs [2022-11-26 01:11:57,222 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:58,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49733#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (< 100000 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:58,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:58,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:11:58,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2022-11-26 01:11:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545127269] [2022-11-26 01:11:58,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:58,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-26 01:11:58,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:58,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-26 01:11:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73949, Invalid=80107, Unknown=0, NotChecked=0, Total=154056 [2022-11-26 01:11:58,469 INFO L87 Difference]: Start difference. First operand 1727 states and 2489 transitions. Second operand has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) [2022-11-26 01:12:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:15,416 INFO L93 Difference]: Finished difference Result 3458 states and 5179 transitions. [2022-11-26 01:12:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-26 01:12:15,420 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) Word has length 3250 [2022-11-26 01:12:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:15,442 INFO L225 Difference]: With dead ends: 3458 [2022-11-26 01:12:15,442 INFO L226 Difference]: Without dead ends: 3455 [2022-11-26 01:12:15,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9941 GetRequests, 9550 SyntacticMatches, 0 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5351 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=73949, Invalid=80107, Unknown=0, NotChecked=0, Total=154056 [2022-11-26 01:12:15,456 INFO L413 NwaCegarLoop]: 1549 mSDtfsCounter, 8 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 9517 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 9519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:15,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2845 Invalid, 9519 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 9517 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-26 01:12:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3455 states. [2022-11-26 01:12:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3455 to 3455. [2022-11-26 01:12:15,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 1920 states have (on average 1.0005208333333333) internal successors, (1921), 1920 states have internal predecessors, (1921), 1532 states have call successors, (1532), 2 states have call predecessors, (1532), 2 states have return successors, (1532), 1532 states have call predecessors, (1532), 1532 states have call successors, (1532) [2022-11-26 01:12:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 4985 transitions. [2022-11-26 01:12:15,655 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 4985 transitions. Word has length 3250 [2022-11-26 01:12:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:15,660 INFO L495 AbstractCegarLoop]: Abstraction has 3455 states and 4985 transitions. [2022-11-26 01:12:15,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.9818181818181815) internal successors, (1918), 385 states have internal predecessors, (1918), 382 states have call successors, (1528), 1 states have call predecessors, (1528), 1 states have return successors, (1528), 382 states have call predecessors, (1528), 382 states have call successors, (1528) [2022-11-26 01:12:15,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 4985 transitions. [2022-11-26 01:12:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6515 [2022-11-26 01:12:16,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:16,136 INFO L195 NwaCegarLoop]: trace histogram [766, 766, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:12:16,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:16,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902b7951-f2cf-4291-9b08-c794a7395b8b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:16,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash -252015072, now seen corresponding path program 8 times [2022-11-26 01:12:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:16,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555432851] [2022-11-26 01:12:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat