./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V --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 cfc9b98f01b5740214418c1e274ef62d42bd44052b6c9ba666982a6bcd7671c6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:02:46,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:02:46,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:02:46,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:02:46,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:02:46,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:02:46,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:02:46,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:02:46,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:02:46,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:02:46,674 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:02:46,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:02:46,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:02:46,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:02:46,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:02:46,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:02:46,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:02:46,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:02:46,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:02:46,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:02:46,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:02:46,707 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:02:46,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:02:46,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:02:46,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:02:46,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:02:46,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:02:46,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:02:46,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:02:46,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:02:46,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:02:46,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:02:46,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:02:46,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:02:46,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:02:46,741 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:02:46,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:02:46,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:02:46,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:02:46,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:02:46,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:02:46,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:02:46,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:02:46,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:02:46,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:02:46,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:02:46,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:02:46,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:02:46,781 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:02:46,781 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:02:46,782 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:02:46,782 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:02:46,782 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:02:46,782 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:02:46,782 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:02:46,783 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:02:46,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:02:46,783 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:02:46,783 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:02:46,784 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:02:46,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:02:46,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:02:46,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:02:46,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:02:46,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:02:46,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:02:46,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:02:46,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:02:46,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:02:46,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:02:46,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:02:46,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:02:46,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:02:46,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:02:46,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:02:46,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:02:46,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:02:46,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:02:46,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:02:46,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:02:46,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:02:46,789 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:02:46,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:02:46,790 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfc9b98f01b5740214418c1e274ef62d42bd44052b6c9ba666982a6bcd7671c6 [2021-11-23 03:02:47,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:02:47,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:02:47,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:02:47,165 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:02:47,166 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:02:47,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-11-23 03:02:47,285 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/data/4a1e9cc53/fc3961b1e59c4debb7418bb909042082/FLAG307a8831c [2021-11-23 03:02:47,828 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:02:47,828 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2021-11-23 03:02:47,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/data/4a1e9cc53/fc3961b1e59c4debb7418bb909042082/FLAG307a8831c [2021-11-23 03:02:48,222 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/data/4a1e9cc53/fc3961b1e59c4debb7418bb909042082 [2021-11-23 03:02:48,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:02:48,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:02:48,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:02:48,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:02:48,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:02:48,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@938304c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48, skipping insertion in model container [2021-11-23 03:02:48,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:02:48,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:02:48,458 WARN L230 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_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/sv-benchmarks/c/bitvector-loops/diamond_2-1.c[373,386] [2021-11-23 03:02:48,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:02:48,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:02:48,541 WARN L230 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_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/sv-benchmarks/c/bitvector-loops/diamond_2-1.c[373,386] [2021-11-23 03:02:48,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:02:48,586 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:02:48,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48 WrapperNode [2021-11-23 03:02:48,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:02:48,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:02:48,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:02:48,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:02:48,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,622 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,666 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2021-11-23 03:02:48,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:02:48,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:02:48,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:02:48,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:02:48,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:02:48,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:02:48,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:02:48,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:02:48,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (1/1) ... [2021-11-23 03:02:48,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:02:48,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:02:48,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:02:48,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:02:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:02:48,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:02:48,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:02:48,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:02:48,915 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:02:48,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:02:49,141 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:02:49,245 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:02:49,261 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:02:49,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:49 BoogieIcfgContainer [2021-11-23 03:02:49,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:02:49,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:02:49,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:02:49,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:02:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:02:48" (1/3) ... [2021-11-23 03:02:49,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0999d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:49, skipping insertion in model container [2021-11-23 03:02:49,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:02:48" (2/3) ... [2021-11-23 03:02:49,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc0999d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:02:49, skipping insertion in model container [2021-11-23 03:02:49,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:49" (3/3) ... [2021-11-23 03:02:49,275 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2021-11-23 03:02:49,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:02:49,301 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:02:49,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:02:49,430 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:02:49,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:02:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:02:49,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:49,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:02:49,472 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash 3743671, now seen corresponding path program 1 times [2021-11-23 03:02:49,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:49,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680333115] [2021-11-23 03:02:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:49,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:02:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:02:49,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:02:49,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680333115] [2021-11-23 03:02:49,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680333115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:02:49,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:02:49,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:02:49,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891190758] [2021-11-23 03:02:49,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:02:49,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:02:49,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:49,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:02:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:02:49,829 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:49,866 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-23 03:02:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:02:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 03:02:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:49,883 INFO L225 Difference]: With dead ends: 13 [2021-11-23 03:02:49,883 INFO L226 Difference]: Without dead ends: 6 [2021-11-23 03:02:49,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:02:49,892 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:49,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:02:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-23 03:02:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-23 03:02:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-23 03:02:49,933 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-23 03:02:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:49,934 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-23 03:02:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:02:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-23 03:02:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 03:02:49,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:49,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 03:02:49,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:02:49,936 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:49,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:49,937 INFO L85 PathProgramCache]: Analyzing trace with hash 116174905, now seen corresponding path program 1 times [2021-11-23 03:02:49,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:49,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92935056] [2021-11-23 03:02:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:49,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:02:49,995 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:02:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:02:50,063 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:02:50,063 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:02:50,066 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:02:50,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:02:50,073 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-23 03:02:50,076 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:02:50,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:02:50 BoogieIcfgContainer [2021-11-23 03:02:50,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:02:50,100 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:02:50,100 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:02:50,100 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:02:50,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:02:49" (3/4) ... [2021-11-23 03:02:50,102 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:02:50,156 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:02:50,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:02:50,157 INFO L158 Benchmark]: Toolchain (without parser) took 1930.03ms. Allocated memory is still 115.3MB. Free memory was 74.4MB in the beginning and 43.1MB in the end (delta: 31.3MB). Peak memory consumption was 29.2MB. Max. memory is 16.1GB. [2021-11-23 03:02:50,158 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:02:50,159 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.37ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 89.3MB in the end (delta: -15.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:02:50,159 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.45ms. Allocated memory is still 115.3MB. Free memory was 89.3MB in the beginning and 87.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:02:50,180 INFO L158 Benchmark]: Boogie Preprocessor took 51.28ms. Allocated memory is still 115.3MB. Free memory was 87.6MB in the beginning and 86.5MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 03:02:50,181 INFO L158 Benchmark]: RCFGBuilder took 543.97ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 71.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 03:02:50,181 INFO L158 Benchmark]: TraceAbstraction took 831.86ms. Allocated memory is still 115.3MB. Free memory was 70.8MB in the beginning and 45.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-23 03:02:50,182 INFO L158 Benchmark]: Witness Printer took 56.86ms. Allocated memory is still 115.3MB. Free memory was 44.9MB in the beginning and 43.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:02:50,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 115.3MB. Free memory is still 91.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.37ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 89.3MB in the end (delta: -15.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.45ms. Allocated memory is still 115.3MB. Free memory was 89.3MB in the beginning and 87.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.28ms. Allocated memory is still 115.3MB. Free memory was 87.6MB in the beginning and 86.5MB in the end (delta: 1.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 543.97ms. Allocated memory is still 115.3MB. Free memory was 86.2MB in the beginning and 71.2MB in the end (delta: 15.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 831.86ms. Allocated memory is still 115.3MB. Free memory was 70.8MB in the beginning and 45.2MB in the end (delta: 25.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 56.86ms. Allocated memory is still 115.3MB. Free memory was 44.9MB in the beginning and 43.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 VAL [x=4294967292, x++=49, y=1] [L17] COND FALSE !(x < 99) [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 3 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 03:02:50,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4aae1a13-3e6f-4f14-8bea-3356e0dba9d7/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE