./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a69d5fb397906cd89c0147a3c54d3ad7658561b03775140fca8816654a2bbc3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:18:52,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:18:52,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:18:52,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:18:52,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:18:52,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:18:52,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:18:52,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:18:52,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:18:52,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:18:52,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:18:52,689 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:18:52,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:18:52,690 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:18:52,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:18:52,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:18:52,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:18:52,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:18:52,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:18:52,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:18:52,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:18:52,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:18:52,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:18:52,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:18:52,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:18:52,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:18:52,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:18:52,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:18:52,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:18:52,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:18:52,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:18:52,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:18:52,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:18:52,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:18:52,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:18:52,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:18:52,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:18:52,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:18:52,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:18:52,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:18:52,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:18:52,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:18:52,720 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:18:52,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:18:52,721 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:18:52,721 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:18:52,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:18:52,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:18:52,721 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:18:52,721 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:18:52,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:18:52,722 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:18:52,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:18:52,723 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:18:52,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:18:52,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:18:52,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:18:52,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:18:52,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:18:52,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:18:52,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:18:52,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:18:52,725 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_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69d5fb397906cd89c0147a3c54d3ad7658561b03775140fca8816654a2bbc3d [2022-12-14 15:18:52,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:18:52,914 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:18:52,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:18:52,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:18:52,919 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:18:52,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2022-12-14 15:18:55,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:18:55,679 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:18:55,679 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c [2022-12-14 15:18:55,684 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/data/7d587195b/79b89404183f49bcbc140e7b825c190d/FLAGde5437287 [2022-12-14 15:18:55,695 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/data/7d587195b/79b89404183f49bcbc140e7b825c190d [2022-12-14 15:18:55,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:18:55,698 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:18:55,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:18:55,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:18:55,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:18:55,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3850004e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55, skipping insertion in model container [2022-12-14 15:18:55,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:18:55,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:18:55,844 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_71830080-1c15-42ed-a9b5-4959961fb332/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2022-12-14 15:18:55,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:18:55,864 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:18:55,873 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_71830080-1c15-42ed-a9b5-4959961fb332/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound2.c[597,610] [2022-12-14 15:18:55,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:18:55,889 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:18:55,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55 WrapperNode [2022-12-14 15:18:55,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:18:55,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:18:55,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:18:55,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:18:55,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,914 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-12-14 15:18:55,914 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:18:55,915 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:18:55,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:18:55,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:18:55,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,928 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:18:55,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:18:55,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:18:55,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:18:55,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (1/1) ... [2022-12-14 15:18:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:18:55,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:55,954 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:18:55,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:18:55,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:18:55,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:18:55,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:18:55,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:18:55,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 15:18:55,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 15:18:56,036 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:18:56,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:18:56,139 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:18:56,161 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:18:56,161 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:18:56,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:18:56 BoogieIcfgContainer [2022-12-14 15:18:56,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:18:56,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:18:56,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:18:56,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:18:56,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:18:55" (1/3) ... [2022-12-14 15:18:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a51bf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:18:56, skipping insertion in model container [2022-12-14 15:18:56,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:18:55" (2/3) ... [2022-12-14 15:18:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a51bf44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:18:56, skipping insertion in model container [2022-12-14 15:18:56,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:18:56" (3/3) ... [2022-12-14 15:18:56,170 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound2.c [2022-12-14 15:18:56,185 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:18:56,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:18:56,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:18:56,225 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;@7f1e1d0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:18:56,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:18:56,229 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:18:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 15:18:56,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:56,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:18:56,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -26250642, now seen corresponding path program 1 times [2022-12-14 15:18:56,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:56,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555819584] [2022-12-14 15:18:56,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:56,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:56,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:18:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427292604] [2022-12-14 15:18:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:56,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:56,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:56,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:18:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:18:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:18:56,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:18:56,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:56,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555819584] [2022-12-14 15:18:56,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:18:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427292604] [2022-12-14 15:18:56,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427292604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:18:56,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:18:56,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:18:56,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215435514] [2022-12-14 15:18:56,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:18:56,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:18:56,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:56,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:18:56,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:18:56,557 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:18:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:56,663 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-12-14 15:18:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:18:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 15:18:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:56,672 INFO L225 Difference]: With dead ends: 42 [2022-12-14 15:18:56,672 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 15:18:56,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:18:56,679 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:56,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 37 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:18:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 15:18:56,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 15:18:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:18:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-12-14 15:18:56,716 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2022-12-14 15:18:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-12-14 15:18:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 15:18:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-12-14 15:18:56,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 15:18:56,718 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:56,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:18:56,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:18:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 15:18:56,920 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:56,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:56,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1971909778, now seen corresponding path program 1 times [2022-12-14 15:18:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:56,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799170892] [2022-12-14 15:18:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:56,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:18:56,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157623873] [2022-12-14 15:18:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:56,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:56,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:18:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 15:18:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:18:57,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:18:57,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799170892] [2022-12-14 15:18:57,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:18:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157623873] [2022-12-14 15:18:57,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157623873] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:18:57,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [607703278] [2022-12-14 15:18:57,782 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 15:18:57,782 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:18:57,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:18:57,789 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:18:57,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:18:58,164 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2022-12-14 15:18:58,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:18:58,571 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '230#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:18:58,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:18:58,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:18:58,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-14 15:18:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500496494] [2022-12-14 15:18:58,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:18:58,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 15:18:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:18:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 15:18:58,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:18:58,575 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:18:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:18:58,811 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-12-14 15:18:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:18:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2022-12-14 15:18:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:18:58,812 INFO L225 Difference]: With dead ends: 35 [2022-12-14 15:18:58,812 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 15:18:58,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-12-14 15:18:58,813 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:18:58,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 34 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:18:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 15:18:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-12-14 15:18:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:18:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-12-14 15:18:58,819 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2022-12-14 15:18:58,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:18:58,819 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-12-14 15:18:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:18:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-12-14 15:18:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 15:18:58,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:18:58,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:18:58,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:18:59,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:59,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:18:59,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:18:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 927087193, now seen corresponding path program 1 times [2022-12-14 15:18:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:18:59,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898727781] [2022-12-14 15:18:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:18:59,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:18:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485324544] [2022-12-14 15:18:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:18:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:18:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:18:59,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:18:59,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:18:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:18:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:18:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:18:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:18:59,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:18:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:18:59,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:18:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898727781] [2022-12-14 15:18:59,098 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:18:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485324544] [2022-12-14 15:18:59,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485324544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:18:59,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896764288] [2022-12-14 15:18:59,101 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 15:18:59,101 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:18:59,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:18:59,101 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:18:59,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:18:59,414 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 80 for LOIs [2022-12-14 15:18:59,511 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:19:00,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '420#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 15:19:00,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:19:00,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:19:00,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-12-14 15:19:00,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743208467] [2022-12-14 15:19:00,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:19:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:19:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:00,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:19:00,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 15:19:00,038 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:19:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:00,065 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-12-14 15:19:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 15:19:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-12-14 15:19:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:00,067 INFO L225 Difference]: With dead ends: 31 [2022-12-14 15:19:00,067 INFO L226 Difference]: Without dead ends: 25 [2022-12-14 15:19:00,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-14 15:19:00,068 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 15:19:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-14 15:19:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-12-14 15:19:00,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:19:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-12-14 15:19:00,073 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2022-12-14 15:19:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-12-14 15:19:00,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 15:19:00,073 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-12-14 15:19:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 15:19:00,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:00,074 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:19:00,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:19:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:00,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1587911935, now seen corresponding path program 1 times [2022-12-14 15:19:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:00,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048107543] [2022-12-14 15:19:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:00,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:19:00,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29893989] [2022-12-14 15:19:00,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:00,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:00,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:19:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:19:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 15:19:00,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:19:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:19:00,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:19:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 15:19:00,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:19:00,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048107543] [2022-12-14 15:19:00,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 15:19:00,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29893989] [2022-12-14 15:19:00,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29893989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:19:00,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912876238] [2022-12-14 15:19:00,959 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 15:19:00,959 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:19:00,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:19:00,959 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:19:00,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:19:01,305 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 86 for LOIs [2022-12-14 15:19:01,397 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:19:07,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '653#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 15:19:07,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:19:07,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:19:07,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-12-14 15:19:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938074942] [2022-12-14 15:19:07,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 15:19:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 15:19:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:19:07,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 15:19:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=706, Unknown=1, NotChecked=0, Total=812 [2022-12-14 15:19:07,559 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 15:19:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:19:08,144 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-12-14 15:19:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 15:19:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2022-12-14 15:19:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:19:08,146 INFO L225 Difference]: With dead ends: 44 [2022-12-14 15:19:08,146 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 15:19:08,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=192, Invalid=1213, Unknown=1, NotChecked=0, Total=1406 [2022-12-14 15:19:08,148 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:19:08,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:19:08,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 15:19:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2022-12-14 15:19:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 15:19:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-12-14 15:19:08,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-12-14 15:19:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:19:08,154 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-12-14 15:19:08,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 15:19:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-12-14 15:19:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 15:19:08,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:19:08,154 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 15:19:08,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:19:08,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:08,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:19:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:19:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1376706741, now seen corresponding path program 2 times [2022-12-14 15:19:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:19:08,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728156936] [2022-12-14 15:19:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:19:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:19:08,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 15:19:08,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426295672] [2022-12-14 15:19:08,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:19:08,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:19:08,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:19:08,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:19:08,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 15:19:08,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-12-14 15:19:08,408 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 15:19:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 15:19:08,431 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 15:19:08,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 15:19:08,432 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 15:19:08,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:19:08,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:19:08,640 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2022-12-14 15:19:08,646 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 15:19:08,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:19:08 BoogieIcfgContainer [2022-12-14 15:19:08,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 15:19:08,685 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 15:19:08,685 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 15:19:08,685 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 15:19:08,685 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:18:56" (3/4) ... [2022-12-14 15:19:08,687 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 15:19:08,713 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 15:19:08,713 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 15:19:08,714 INFO L158 Benchmark]: Toolchain (without parser) took 13015.89ms. Allocated memory is still 140.5MB. Free memory was 99.7MB in the beginning and 74.3MB in the end (delta: 25.3MB). Peak memory consumption was 27.4MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,714 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory is still 52.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:19:08,714 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.52ms. Allocated memory is still 140.5MB. Free memory was 99.7MB in the beginning and 89.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,714 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.49ms. Allocated memory is still 140.5MB. Free memory was 89.1MB in the beginning and 87.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,714 INFO L158 Benchmark]: Boogie Preprocessor took 14.49ms. Allocated memory is still 140.5MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,715 INFO L158 Benchmark]: RCFGBuilder took 233.63ms. Allocated memory is still 140.5MB. Free memory was 86.3MB in the beginning and 74.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,715 INFO L158 Benchmark]: TraceAbstraction took 12518.94ms. Allocated memory is still 140.5MB. Free memory was 73.5MB in the beginning and 76.4MB in the end (delta: -2.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 15:19:08,715 INFO L158 Benchmark]: Witness Printer took 28.93ms. Allocated memory is still 140.5MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 15:19:08,716 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 102.8MB. Free memory is still 52.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.52ms. Allocated memory is still 140.5MB. Free memory was 99.7MB in the beginning and 89.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.49ms. Allocated memory is still 140.5MB. Free memory was 89.1MB in the beginning and 87.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 14.49ms. Allocated memory is still 140.5MB. Free memory was 87.5MB in the beginning and 86.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 233.63ms. Allocated memory is still 140.5MB. Free memory was 86.3MB in the beginning and 74.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 12518.94ms. Allocated memory is still 140.5MB. Free memory was 73.5MB in the beginning and 76.4MB in the end (delta: -2.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 28.93ms. Allocated memory is still 140.5MB. Free memory was 76.4MB in the beginning and 74.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0, v=-1073741822, x=0, X=2147483644, Y=536870911, y=0] [L31] EXPR counter++ VAL [counter=1, counter++=0, v=-1073741822, x=0, X=2147483644, y=0, Y=536870911] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=1, v=-1073741822, x=0, x=0, x=0, X=2147483644, y=0, Y=536870911] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=1, v=-1073741822, x=0, X=2147483644, x=0, x=0, y=0, Y=536870911] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=1, v=0, X=2147483644, x=0, x=1, x=0, Y=536870911, y=0, y++=17] [L31] EXPR counter++ VAL [counter=2, counter++=1, v=0, x=0, x=0, x=1, X=2147483644, y=0, Y=536870911, y++=17] [L31] COND TRUE counter++<2 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [counter=2, v=0, x=1, x=536870911, x=0, X=2147483644, y=0, Y=536870911, y++=17] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, counter=2] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [counter=2, v=0, x=536870911, x=1, x=0, X=2147483644, Y=536870911, y=0, y++=17] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=2, v=-3221225466, x=0, x=2, x=536870911, X=2147483644, y=1, Y=536870911, y++=0] [L31] EXPR counter++ VAL [counter=3, counter++=2, v=-3221225466, X=2147483644, x=536870911, x=0, x=2, Y=536870911, y=1, y++=0] [L31] COND FALSE !(counter++<2) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [counter=3, v=-3221225466, X=2147483644, x=2, x=2, x=1073741822, Y=536870911, y=1, y++=0] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, counter=3] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L16] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.4s, OverallIterations: 5, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 87 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 87 mSDsluCounter, 164 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 348 IncrementalHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 37 mSDtfsCounter, 348 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, InterpolantAutomatonStates: 41, 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, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 1038 SizeOfPredicates, 22 NumberOfNonLiveVariables, 300 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 26/42 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! [2022-12-14 15:19:08,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71830080-1c15-42ed-a9b5-4959961fb332/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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